Issuer Summary: Castle Peak Power Company Limited / CASPEA

Date prepared: 2026-05-18
Ticker: CASPEA
Issuer focus: Castle Peak Power Company Limited, referred to below as CAPCO
Related entities: Castle Peak Power Finance Company Limited, CLP Power Hong Kong Limited, CLP Holdings Limited
Scope note: This report focuses primarily on CAPCO. Because public information is limited with respect to CAPCO’s standalone detailed financials, cash balance, committed lines, ANFA covenant headroom and individual bond terms, it uses CLP Holdings’ official materials, the Scheme of Control for CLP Power / CAPCO, referred to below as the SoC, information on CLP’s Hong Kong business, and disclosures on CAPCO-related debt as supplementary sources. CLP Holdings, CLP Power, CAPCO and Castle Peak Power Finance Company Limited should not be treated as the same legal credit.

1. Business Snapshot and Recent Developments

Castle Peak Power Company Limited, referred to in this report as CAPCO, is a generation-asset holding company supporting CLP Power’s supply area in Hong Kong, and is subject to Hong Kong’s Scheme of Control together with CLP Power Hong Kong Limited. CAPCO should not be viewed merely as an independent power producer, nor simply as an ordinary subsidiary of CLP Holdings. It should be analysed as a regulated utility infrastructure company that owns generation assets within Hong Kong’s vertically integrated power framework, with CLP Power effectively acting as its sole offtaker. CAPCO is a joint venture owned 70% by CLP Power and 30% by China Southern Power Grid International (HK) Co., Limited, and holds generation assets that are important to Hong Kong’s supply area, including Black Point, Castle Peak and Penny’s Bay.

The first point to note when analysing CASPEA is that credit risk should not be determined solely by the issuer label. The consolidated credit of CLP Holdings, the regulated retail / transmission and distribution credit of CLP Power, the generation-asset credit of CAPCO, and the bond credit of securities issued by Castle Peak Power Finance Company Limited and guaranteed by CAPCO are closely related, but they are not legally identical. CLP’s official credit ratings page shows CAPCO at S&P AA- / Stable and Moody’s A1 / Stable, which is higher than CLP Holdings’ S&P A / Moody’s A2 rating level. This differential indicates CAPCO’s proximity to Hong Kong regulated generation assets, but it does not mean that investors need not review the guarantee, ranking, covenants, governing law, cross-default provisions and change-of-control provisions of specific bonds.

The central issue in the credit analysis is the extent to which the Hong Kong SoC stabilises CAPCO’s repayment sources. The SoC requires CLP Power and CAPCO to provide a stable and reliable electricity supply at a reasonable cost, while providing a tariff framework for recovering operating expenses, fuel costs, taxes and a permitted return on average net fixed assets. The Fuel Clause Recovery Account, Tariff Stabilisation Fund and Rate Reduction Reserve are important mechanisms for managing fuel-cost fluctuations and tariff smoothing. This supports the predictability of CAPCO’s cash flow, but it is not a legal guarantee that the Hong Kong Government will unconditionally pay CAPCO’s debt.

The latest materials identifiable from 2025 to May 2026 point to resilience in the Hong Kong business and continued capital investment. In CLP Holdings’ 2025 Annual Report, operating earnings before fair value movements from the Hong Kong energy business increased from HK$8,694mn in 2024 to HK$9,312mn in 2025. Hong Kong electricity sales in 2025 were 35,760GWh, and supply reliability was reported at 99.999%. In the Quarterly Statement for January-March 2026, published on 2026-05-18, Hong Kong electricity sales increased 3.2% year on year to 7,319GWh, while sales to data centres increased 11.1%. These are not CAPCO standalone earnings, but they indicate that the demand and earnings base of the Hong Kong regulated business, into which CAPCO’s generation assets are embedded, remained functional in the latest period.

At the same time, CAPCO analysis should not translate CLP Holdings’ latest consolidated results directly into CAPCO’s standalone repayment capacity. CLP Holdings’ consolidation perimeter includes businesses in Mainland China, Australia, India, Taiwan and Southeast Asia, while CAPCO is an entity close to Hong Kong regulated generation assets. CLP Holdings had no external borrowings at the parent-company level at end-2025, and subsidiary debt is described as non-recourse to CLP Holdings. As a result, CAPCO’s credit quality may be closer to regulated assets than the average risk of CLP Holdings’ consolidated group, but CLP Holdings’ liquidity and overseas diversification cannot automatically be imported into CAPCO bonds.

Based on this corporate profile, initial coverage of CASPEA should focus less on revenue growth or consolidated leverage typical of listed operating companies, and more on Hong Kong’s regulated power framework, the role of generation assets, CAPCO-related debt, the guarantee structure, the limits of tariff recovery, and thin information disclosure.

2. Industry Position and Franchise Strength

CAPCO’s franchise does not rest on market share in a competitive market, but on the indispensability of its generation assets within Hong Kong’s electricity supply framework. Hong Kong’s electricity supply is structured around two vertically integrated utilities, CLP Power and HK Electric, each serving a defined territory. CLP Power supplies electricity to around 80% of Hong Kong’s population, covering Kowloon, the New Territories and most outlying islands. CAPCO owns large-scale generation assets serving this supply area and is linked to CLP Power’s operations, sales, and transmission and distribution network. CAPCO’s business base is therefore supported not by diversification across multiple offtakers, as in a typical IPP, but by its integration with CLP Power and the SoC framework.

Hong Kong electricity demand is mature, but it is not entirely stagnant. CLP’s Hong Kong electricity sales were 35,760GWh in 2025, and sales for January-March 2026 increased 3.2% year on year to 7,319GWh. Data-centre demand was particularly strong, increasing 11.1% year on year in January-March 2026, while developments such as the Northern Metropolis, Lok Ma Chau Loop, Yuen Long, Hung Shui Kiu and the Sandy Ridge Data Facility Cluster may support long-term demand for transmission, distribution and generation capacity. Demand growth is a revenue opportunity for CAPCO, but it also entails capital burdens related to generation and network investment, fuel transition, and the maintenance of system reliability.

The SoC is the institutional core of this franchise. CLP Power and CAPCO are required to provide stable supply, reliability, safety, environmental performance and reasonable costs. Tariffs are designed on the premise of recovering operating expenses, fuel costs, taxes and permitted returns. The current SoC, which runs from 2018 to end-2033, provides a long-term regulatory framework, and the 2024-2028 Development Plan approved estimated CLP-side capital expenditure of HK$52.9bn. This shows that long-term investment in Hong Kong power infrastructure is handled within the regulatory framework.

However, the SoC is not a fully automatic profit guarantee. The Development Plan is confirmed by the Government’s Executive Council, taking into account the need for investment, tariff impact, environmental policy and supply reliability. Fuel costs are also adjusted through the Fuel Clause Recovery Account, but the timing and tariff level are subject to political and regulatory judgement through pass-through to customer tariffs, use of the Tariff Stabilisation Fund, the Rate Reduction Reserve and consultation with the Government. CLP Power’s average net tariff for 2026 is HK140.6 cents/kWh, down 2.6% year on year, with lower fuel costs passed back to customers. This demonstrates the transparency of the framework, while also showing that social acceptance of tariffs remains important.

CAPCO’s industry position should be assessed as functional importance to Hong Kong’s electricity framework, not as direct credit exposure to the Hong Kong Government. If its power stations stop operating, this directly affects CLP Power’s supply reliability, and CAPCO’s investment and costs are recognised within the tariff framework. At the same time, as Hong Kong simultaneously pursues decarbonisation, a higher gas mix, data-centre demand growth, Northern Metropolis development and customer tariff restraint, CAPCO faces not only stable earnings but also capital-allocation and fuel-transition execution risk.

3. Segment Assessment

CAPCO’s standalone segment disclosure is limited, so this section uses CAPCO’s main generation assets and CLP’s Hong Kong business earnings contribution as supporting reference points. CAPCO is not an independent reporting segment within CLP Holdings’ consolidated accounts. Accordingly, the asset overview below is intended to understand the risks of CAPCO’s generation assets, not to indicate CAPCO’s standalone margins or cash flow directly.

The most important asset for CAPCO is Black Point Power Station. CLP’s official Black Point page describes the station as a gas-fired power station with gross capacity of 3,850MW. The 2025 Annual Report highlights also show Black Point C & D in Hong Kong at 3,850MW. Black Point is a core asset for Hong Kong’s decarbonisation and reduction of coal dependence. Gas-fired generation emits less than coal and is consistent with Hong Kong’s environmental policy, but LNG prices, gas supply, fuel-cost adjustment and plant utilisation are credit monitoring points.

Castle Peak Power Station is a large coal-fired power station that has long served as a backbone power source for Hong Kong. CLP’s official Castle Peak page shows gross capacity of 3,058MW after three of the four units at Castle Peak A, totalling 1,050MW, were retired by mid-2024. From a credit perspective, it supports supply reliability and capacity as an existing asset, but decarbonisation, environmental regulation, fuel prices, maintenance, retirement plans and its role as reserve capacity are key issues. Coal facilities contribute to supply stability and fuel diversification in the short term, but over the long term they are more exposed to investor demand, rating-agency ESG assessment, insurance and funding availability, emissions costs and government policy.

Penny’s Bay Power Station is described on CLP’s official page as a 300MW generation asset for standby and peak-demand response. Its value lies more in its ability to respond to emergencies and short-duration peak demand than in its ordinary earnings contribution. Such facilities are difficult to assess based solely on generation volume. For CAPCO credit, the key issue is not only how much electricity the facility sells, but whether its costs and investment are recognised within the SoC as an asset supporting reliability in Hong Kong’s supply area.

CLP’s Hong Kong business is the most stable earnings source within CLP Holdings’ consolidated group. Operating earnings before fair value movements from the Hong Kong energy business were HK$9,312mn in 2025, up 7.1% from 2024. This is not CAPCO standalone profit, but it shows the earnings capacity of the Hong Kong regulated business into which CAPCO is embedded. CLP Holdings’ consolidated revenue in 2025 was HK$88,018mn, of which Hong Kong sales of electricity were HK$48,967mn and SoC sales of electricity were HK$49,263mn. Because Hong Kong SoC-related revenue accounts for more than half of consolidated revenue, CAPCO’s generation assets are also important in supporting CLP Group credit.

CAPCO’s asset mix is not risk-free. The transition to gas-fired generation is favourable from an environmental perspective, but it increases dependence on LNG prices and fuel-cost adjustment. Coal-fired generation contributes to supply stability, but its long-term role is declining. If Hong Kong electricity demand grows due to data centres and urban development, the value of CAPCO’s assets is likely to rise, but this will also raise issues around new investment and the impact on customer tariffs. In analysing CAPCO credit, it is necessary to continue monitoring not only whether the assets are “protected by regulation”, but also which assets are being used for which policy objectives, and which costs are reflected in tariffs at what timing.

4. Financial Profile and Analysis

The first point to state in CAPCO’s financial analysis is the asymmetry of public information. CLP Holdings’ Annual Report includes important information on CAPCO-related debt, its status as a SoC-regulated entity, generation assets and earnings from CLP’s Hong Kong business. However, it does not provide full confirmation of CAPCO’s standalone comprehensive income statement, balance sheet, cash-flow statement, cash balance, committed lines, ANFA covenant headroom or restrictions on fund transfers. This report does not purport to calculate CAPCO’s repayment capacity directly; instead, it uses identifiable surrounding indicators as supplementary inputs.

The most useful supplementary indicators are CLP’s Hong Kong business earnings, CLP’s consolidated operating cash flow, identifiable CAPCO-related debt and the cost-recovery mechanism under the SoC. CLP’s Hong Kong energy business operating earnings were HK$9,312mn in 2025, representing the majority of CLP Holdings’ consolidated operating earnings before fair value movements of HK$10,685mn. Consolidated net cash inflow from operations was HK$26,258mn, free cash flow as disclosed by CLP in its Financial Review was HK$22,551mn, capital expenditure was HK$15,539mn, total borrowings were HK$61,829mn and net debt to total capital was 33.0%. The free cash flow figure here is a company-disclosed CLP metric, and is not CAPCO standalone operating cash flow minus CAPCO standalone capex. These indicators are supplementary evidence that the Hong Kong SoC business supports the quality of the group’s operating cash flow, but they do not indicate the direct payment source for CAPCO or Castle Peak Power Finance.

The table shows that earnings from the Hong Kong business are stable and CLP’s consolidated leverage is held at a moderate level. This is supportive for CAPCO credit, but it is insufficient for the final checks required for investment decisions. The repayment source for CAPCO bonds is close to the CAPCO guarantee and regulated generation assets, while CLP Holdings’ consolidated undrawn bank lines, company-disclosed free cash flow and overseas business cash flow may not directly be available for legal payment on Castle Peak Power Finance bonds.

Identifiable CAPCO-related debt is included in the debt notes in CLP Annual Report Financials. Castle Peak Power Finance Company Limited’s 2.20% US$500mn guaranteed notes due 2030 are shown as guaranteed by CAPCO, with an outstanding balance of HK$3,882mn as of 2025-12-31. In addition, CAPCO term loans of HK$4,900mn due 2035 and HK$2,400mn due 2036 can be identified. Each has financial covenants relating to total debt / ANFA, with the former at no more than 30% and the latter at no more than 35%.

The ANFA covenant is important for CAPCO credit. ANFA is generally understood as average net fixed assets and is often treated as a concept close to the SoC permitted-return base and regulated asset base. However, the definition of ANFA under these covenants, calculation scope, exclusions and covered debt could not be confirmed in this review. The existence of a total debt / ANFA covenant is a protective factor, suggesting that debt is designed to remain within a certain range relative to the scale of regulated assets. However, the public information available in this review does not allow recalculation of end-2025 ANFA, total debt for covenant purposes, headroom, or the existence of any waiver or amendment. Accordingly, the existence of covenants is positive, but this report does not conclude that headroom is large.

CAPCO’s financial strength is that its repayment source is close to Hong Kong SoC-regulated generation assets. A typical generation company is directly exposed to fuel prices, power market prices, utilisation rates, PPA prices and demand. For CAPCO, the relationship with CLP Power and the SoC embed the recovery of operating expenses, fuel costs, taxes and permitted returns within the regulatory framework. This is an important support for refinancing long-term debt.

The financial constraints are thin standalone disclosure and the social constraints of the tariff framework. Even if CLP’s consolidated financial profile is sound, CAPCO’s standalone cash balance, short-term debt, bank lines, maintenance investment, fuel-related working capital and covenant headroom must be checked individually. In addition, while the SoC supports cost recovery, when tariff increases affect customer burden or government policy, timing of recovery and smoothing treatment could place temporary pressure on credit metrics.

5. Structural Considerations for Bondholders

For CASPEA bondholders, the most important issue is which legal entity they have a claim against. The CLP Group name, the Hong Kong SoC and CAPCO’s high rating are starting points for credit assessment, but actual bond investment requires confirmation of whether the issuer is Castle Peak Power Finance Company Limited, whether the guarantor is CAPCO, whether there is any guarantee from CLP Power or CLP Holdings, and where the debt ranks.

The central CAPCO-related public bond identified in this review is Castle Peak Power Finance Company Limited’s 2.20% US$500mn guaranteed notes due 2030. CLP Annual Report Financials show these notes as guaranteed by CAPCO. It is therefore natural to read the structure as one in which investors hold a claim against Castle Peak Power Finance, a funding SPV, and access CAPCO credit through the CAPCO guarantee. However, because the Offering Circular or final terms have not been reviewed, the scope, unconditionality, ranking, negative pledge, events of default, cross-default, tax gross-up, change of control, governing law, listing market and security package are unconfirmed.

It is also important to distinguish what the SoC supports from what it does not. For CLP Power and CAPCO’s Hong Kong regulated business, the SoC provides institutional support through tariff recovery, permitted returns, fuel-cost adjustment, tariff stabilisation and Development Plan approval. This materially reduces CAPCO’s business risk. However, the SoC is not a contract under which the Hong Kong Government guarantees principal and interest on the bonds. The Hong Kong Government supervises the tariff framework and power policy, but it is not an explicit obligor on CAPCO debt.

The presence of China Southern Power Grid International (HK) as a minority shareholder of CAPCO can be both a supplementary credit positive and a constraint. A strategic shareholder affiliated with China Southern Power Grid appears positive in terms of generation and transmission infrastructure expertise, regional energy relationships and a long-term investment stance. For bondholders, however, it is necessary to verify whether the minority shareholder guarantees the debt, has funding-support obligations, or affects decision-making and dividend policy. At present, the minority shareholder’s presence should not be treated as legal credit enhancement.

The distance between the CLP Holdings parent and CAPCO debt is also easy to misread. CLP Holdings’ Financial Review states that there were no external borrowings at the CLP Holdings parent-company level at end-2025 or end-2024, and that subsidiary debt is non-recourse to CLP Holdings. This has two implications for CAPCO bond investors. First, CAPCO and CLP Power may appear stronger from a credit perspective than the CLP Holdings parent because they are closer to regulated assets. Second, CLP Holdings’ consolidated assets and liquidity should not be assumed to be legal recovery sources for CAPCO bondholders.

6. Capital Structure, Liquidity and Funding

CAPCO’s capital structure should be viewed as a combination of SoC-regulated generation assets and long-term debt. The identifiable CAPCO-related debt is spread across 2030, 2035 and 2036, and there is no apparent extreme short-term maturity concentration in public information. However, CAPCO’s standalone cash balance, committed lines, short-term borrowings, debt maturity schedule, hedges, maintenance spending by generation asset, and ANFA covenant headroom are unconfirmed. Accordingly, the liquidity assessment should be limited to the position that a long-term debt structure close to regulated assets is supportive, but verification of standalone liquidity remains insufficient.

The 2030 notes are denominated in US dollars, and the balance shown in Hong Kong dollars was HK$3,882mn at end-2025. Because the Hong Kong dollar operates under a US dollar peg, the FX risk of US dollar debt appears lower than for other Asian currencies. However, interest-rate risk, market conditions at the time of reinvestment or refinancing, investor demand in the US dollar market, Reg S / 144A liquidity and hedging costs need to be checked in individual bond analysis.

The 2035 and 2036 term loans support CAPCO’s long-term funding and regulated asset investment. The existence of total debt / ANFA covenants is important as protection against debt becoming excessive relative to the regulatory value of generation assets. However, it is unconfirmed which year, definition and exclusions are used to calculate ANFA, and how much headroom exists. If CAPCO proceeds with new gas generation, transmission connections, environmental measures or coal-retirement-related investment, ANFA itself may increase, but debt may also increase at the same time, so covenant headroom must be recalculated.

CLP Holdings’ consolidated liquidity is supportive as background to the group market access surrounding CAPCO. At end-2025, cash and cash equivalents were HK$3,905mn and undrawn facilities were HK$25,507mn. Consolidated net cash inflow from operations was HK$26,258mn, and the CLP Group as a whole maintains high ratings, bank facilities and bond-market access. However, this consolidated liquidity is not itself the direct payment source for CAPCO or Castle Peak Power Finance. In the final assessment of CAPCO bonds, it is necessary to confirm whether consolidated bank lines are available to CAPCO, and what CAPCO’s own cash, bank facilities and short-term debt look like.

The funding strength is that the generation assets are subject to the Hong Kong SoC and CAPCO is close to the CLP Power / CAPCO regulatory framework. The market is likely to assess CAPCO not as a simple coal and gas generation company, but as a regulated generation company embedded in Hong Kong’s highly reliable power supply. CAPCO’s official ratings of S&P AA- and Moody’s A1 support this market access.

The constraint is the balance between capital investment and customer tariffs. The HK$52.9bn estimated CLP-side capital expenditure under the 2024-2028 Development Plan represents investment required for reliability in Hong Kong’s supply area, Northern Metropolis and other developments, decarbonisation, gas generation and T&D reinforcement. These support the regulated asset base and earnings base over the long term, but in the short to medium term they may raise debt, tariffs, capital expenditure and covenant pressure at the same time. To assess CAPCO’s funding capacity, it is necessary to verify how much of the Development Plan relates directly to CAPCO generation assets and how that amount is reflected in ANFA and tariffs.

7. Rating Agency View

CAPCO’s official rating level is high even within the CLP Group. According to CLP’s official credit ratings page, CAPCO is rated S&P AA- / Stable and Moody’s A1 / Stable. CLP Power is rated S&P A+ / Moody’s A1, CLP Holdings S&P A / Moody’s A2, and EnergyAustralia Moody’s Baa2 / Positive. The rating differential suggests that, at least in rating terms, CAPCO is viewed as a credit close to Hong Kong SoC-regulated generation assets. However, because the latest full rating reports have not been obtained, this report does not make a definitive statement on the reasons for the notching above CLP Holdings, the standalone assessment or the support assessment.

This report has not obtained the latest full S&P and Moody’s reports, standalone credit profile, support uplift, downgrade / upgrade triggers or rating-agency adjusted metrics. Accordingly, the rating level is used as a fact confirmed on the official page, but the detailed rating-agency rationale is not presented as this report’s own analysis. It can be inferred that CAPCO’s high rating reflects the Hong Kong SoC, the importance of its generation assets, its relationship with CLP Power, debt limitations relative to regulated assets and strong market access, but the details should be confirmed in the full reports.

The important point when using ratings for credit judgement is that CAPCO’s high rating does not imply a government guarantee. The high rating likely reflects institutional stability and low business risk, but the legal payment obligation on the bonds follows the contract between the issuer and guarantor. Government supervision of the tariff framework and approval of the Development Plan are separate from a government guarantee of principal and interest on CAPCO bonds.

Potential downgrade risks include lower predictability of the SoC, political delays in tariff recovery, higher CAPCO debt, reduced ANFA covenant headroom, major generation-asset problems, insufficient fuel-cost adjustment, changes in the relationship with CLP Power or the regulatory structure, and changes in Hong Kong’s sovereign or regulatory environment. Upgrade potential may be limited because the rating is already high. For investors, the more important issues are the conditions under which the rating can be maintained and how the differential versus CLP Holdings and CLP Power is reflected in market spreads.

8. Credit Positioning

CASPEA is most naturally positioned as a high-grade subsidiary bond close to a Hong Kong regulated utility. CAPCO is closer to regulated generation assets than CLP Holdings’ consolidated credit, clearly lower risk than EnergyAustralia, and positioned alongside CLP Power at the core of the Hong Kong SoC. However, it is not a Hong Kong Government bond or government-guaranteed bond, and should not be treated as sovereign-equivalent.

Compared with CLP Holdings bonds, CAPCO-related bonds benefit from closer proximity to regulated assets and higher ratings. CLP Holdings is a consolidated group credit that includes Mainland China, Australia, India, Taiwan and Southeast Asia, and incorporates overseas business volatility and holding-company distance. CAPCO appears to have lower business risk because of its proximity to Hong Kong generation assets, but standalone disclosure and bond terms become more important.

Compared with CLP Power bonds, CAPCO is closer to generation assets, while CLP Power is closer to sales, transmission and distribution, and customer tariff collection. Both are SoC-regulated entities and depend on the same framework. CLP Power is closer to customer tariffs and the T&D network, while CAPCO is closer to generation fuel, plant operation and generation-asset investment. This distinction changes how risk appears even within the same Hong Kong SoC framework.

Compared with HK Electric, the most important commonality is the Hong Kong SoC. HK Electric is also a vertically integrated Hong Kong power utility dependent on its supply area, the SoC, tariff framework, and generation and T&D investment. However, the supply area, generation mix, capital structure, parent / issuer structure and bond liquidity differ. When assessing CASPEA, it would be useful to compare spreads, ratings, maturities, currencies and terms against HK Electric-related bonds as a Hong Kong SoC peer.

Compared with Singapore Power, KEPCO and KOGAS, the nature of support differs. Singapore Power is a Singapore regulated network utility 100%-owned by Temasek, with stronger features of government ownership and network regulation. KEPCO and KOGAS have strong expectations of Korean government support, but heavy tariff politics, commodity-price exposure and debt levels. CAPCO is a regulated generation company within a privately listed group. It is weaker than policy-linked quasi-sovereigns in terms of direct government support, but its business scope is closer to the Hong Kong SoC and earnings visibility is high.

This report does not make a relative-value judgement. Live prices, yields, OAS, Z spread, G spread and comparisons with same-tenor CLP Power / HK Electric / Singapore Power / Hong Kong government-related bonds have not been confirmed. For investment decisions, it is necessary to separately confirm how much of CAPCO’s high rating and SoC stability is reflected in the spread, considering the individual bond’s liquidity, 2030 maturity, USD denomination, guarantee terms, issue size and market technicals.

9. Key Credit Strengths and Constraints

CAPCO’s greatest credit strength is its indispensability to Hong Kong’s electricity supply and proximity to the SoC. CLP Power’s supply area covers around 80% of Hong Kong’s population, and CAPCO owns generation assets serving that area. Its generation assets span Black Point, Castle Peak and Penny’s Bay, including gas-fired generation, coal-fired generation and standby facilities. Because electricity supply reliability is directly tied to Hong Kong’s daily life, industry and urban development, CAPCO’s assets are socially important.

The second strength is the tariff and cost-recovery framework. The SoC provides a framework for recovering operating expenses, fuel costs, taxes and a permitted return on average net fixed assets. The Fuel Clause Recovery Account also provides a mechanism for reflecting fuel-cost fluctuations in customer tariffs. Compared with ordinary generation companies that are directly exposed to market prices and fuel prices, this materially increases the predictability of earnings and cash flow.

The third strength is official ratings and market access. CAPCO has high ratings of S&P AA- / Stable and Moody’s A1 / Stable. CAPCO-related debt is spread across 2030, 2035 and 2036, and the term loans have debt covenants relative to ANFA. The existence of a debt-management framework relative to regulated assets is important for bondholders.

The largest constraint, however, is that the SoC is not a government guarantee. CAPCO’s business is institutionally protected, but the Hong Kong Government does not unconditionally guarantee bond principal and interest. Tariff-setting is subject to government supervision and affected by customer burden, fuel costs, environmental policy, the appropriateness of investment plans and social acceptance. The cost-recovery mechanism is strong, but regulatory and political elements remain in the timing and level of recovery.

The second constraint is insufficient CAPCO standalone disclosure. CAPCO’s ratings, debt, generation assets and status under the SoC can be confirmed, but standalone profit and loss, operating cash flow, cash balance, bank lines, short-term debt and ANFA headroom cannot be sufficiently confirmed. High ratings should not be used as a basis for inferring liquidity or covenant headroom.

The third constraint is transition risk in the generation assets. Black Point’s gas-fired generation contributes to Hong Kong’s lower-carbon transition, but depends on LNG prices and fuel procurement. Castle Peak’s coal-fired generation contributes to supply stability, but over the long term is constrained by decarbonisation, environmental regulation, insurance, funding and investor demand. CAPCO has a regulated utility framework for investment recovery, but the renewal, retirement and fuel transition of generation assets will remain central issues for long-term credit.

10. Downside Scenarios and Monitoring Triggers

The most realistic downside scenario is one in which fuel costs, capital investment and tariff restraint simultaneously pressure CAPCO’s funding position. If LNG or coal prices rise, fuel-cost adjustment is delayed, and use of the Tariff Stabilisation Fund or Rate Reduction Reserve is needed to limit customer tariff increases, short-term working capital and regulatory accounting balances may fluctuate. The SoC supports fuel-cost recovery, but it does not guarantee immediate and full pass-through to customer tariffs.

The second downside scenario is a major generation-equipment problem. Gas-fired generation including Black Point D2, Castle Peak’s coal-fired units and Penny’s Bay standby facilities are essential for maintaining supply reliability. A major plant outage, fuel-supply constraint, gas-turbine failure, delay in coal-unit maintenance or delay in environmental-regulation compliance would affect CLP Power’s supply reliability, maintenance costs, capital expenditure, insurance and relationship with the regulator.

The third downside scenario is that a review of the SoC or Development Plan becomes unfavourable for permitted returns or investment recognition. The current SoC runs until end-2033, but electricity tariffs, decarbonisation, customer burden, Hong Kong’s economy and government policy can change. A cut in permitted returns, stricter investment approval, delays in fuel-cost recovery or greater uncertainty around recovery of past investment would put downward pressure on CAPCO’s credit spread and rating outlook.

The fourth downside scenario is higher CAPCO debt and reduced ANFA covenant headroom. If spending on gas-fired generation, environmental measures, transmission connections, ageing-asset renewal or coal-retirement-related costs increases while tariff reflection or ANFA growth is slower than expected, the total debt / ANFA covenant would become a monitoring focus. At this stage, the existence of covenants can be confirmed, but headroom cannot be recalculated, so this should be one of the highest-priority pre-investment checks.

The fifth downside scenario is misreading the bond structure. If investors look only at CAPCO’s high rating and fail to verify Castle Peak Power Finance’s issuer risk, the scope of the CAPCO guarantee, the absence of guarantees from CLP Power or CLP Holdings, cross-default, negative pledge, change of control, tax gross-up and events of default, the assumed recovery source may diverge from the actual legal claim. Even if the credit quality itself does not deteriorate, this could lead to incorrect risk assessment for the individual bond investment.

Future monitoring should prioritise 2026 Interim Results, the 2026 Q3 Quarterly Statement, Hong Kong tariff reviews, Fuel Clause Adjustment, implementation of the 2024-2028 Development Plan, operating status of Black Point and Castle Peak, new issuance and refinancing of CAPCO-related debt, ANFA covenants, S&P / Moody’s rating actions, and CASPEA bond market prices and spreads. In particular, if CAPCO standalone financials and liquidity can be obtained, this report’s analysis based on supplementary indicators should be updated.

11. Credit View and Monitoring Focus

CAPCO’s current credit-quality level can be assessed as that of a high-grade Hong Kong regulated utility subsidiary, based on its official ratings, proximity to the Hong Kong SoC, the indispensability of CLP Power’s supply area and the importance of CAPCO’s generation assets. The credit direction is not one of rapid deterioration, given the resilience of the Hong Kong business from 2025 to January-March 2026 and the continuing function of the Development Plan and tariff framework. However, because CAPCO standalone financials and ANFA headroom cannot be confirmed, this report also does not conclude that the credit is on a materially improving trajectory. The probability of a rapid short-term change in level or direction appears low under normal conditions, but if SoC terms, tariff recovery, fuel costs, equipment problems, debt growth and rating outlook deteriorate simultaneously, spreads and rating outlook could react first.

This view is supported by CAPCO’s deep integration into Hong Kong’s regulated power supply. CAPCO is a SoC-regulated entity together with CLP Power, and CLP Power supplies electricity to around 80% of Hong Kong’s population. The Black Point, Castle Peak and Penny’s Bay generation assets are directly tied to Hong Kong’s supply reliability, fuel transition, decarbonisation and urban-development demand. The SoC provides a framework for recovering operating expenses, fuel costs, taxes and permitted returns, and manages fluctuations in fuel costs and tariffs through the Fuel Clause Recovery Account and Tariff Stabilisation Fund.

At the same time, CAPCO should not be treated as a Hong Kong Government-guaranteed bond. The Government supervises the SoC and Development Plan and provides institutional support through the tariff framework, but it is not an unconditional guarantor of CAPCO debt. Investors need to verify whether the issuer is Castle Peak Power Finance, whether the guarantor is CAPCO, whether there are guarantees from CLP Power or CLP Holdings, and how ranking and covenants are structured. CAPCO’s high rating is a strong factor, but it does not replace review of individual bond terms.

From a purely credit perspective, CASPEA could be a candidate holding as a defensive Hong Kong regulated utility exposure. However, any individual investment decision should be made only after confirming the issuer, guarantee, ranking, covenants, liquidity and market level. This report has not confirmed live spreads, prices, yields, OAS, or comparisons with same-tenor HK Electric, CLP Power, Singapore Power and Hong Kong government-related bonds, so it does not judge whether the bond is cheap or rich. It is necessary to separately confirm whether liquidity, terms, issue size and same-rating peer comparison provide sufficient compensation for the high rating, 2030 maturity, CAPCO guarantee and SoC stability.

For future monitoring, obtaining CAPCO standalone financials and ANFA covenant headroom is the top priority. The next items to review are 2026 Interim Results, tariff revisions, Fuel Clause Adjustment, Development Plan investment, operating status of Black Point D2 and Castle Peak, refinancing of CAPCO-related debt, rating-agency comments and specific CASPEA bond terms. Conditions for an improved credit view would be sufficient CAPCO standalone liquidity and covenant headroom, stable earnings from the Hong Kong SoC business, and balanced progress in investment and tariff recovery. Conditions for deterioration would be a combination of fuel costs, tariff politics, equipment problems and debt growth that causes rating agencies to become more cautious about maintaining CAPCO’s high rating.

12. Short Summary & Conclusion

Castle Peak Power Company Limited is a generation-asset holding company subject to Hong Kong’s Scheme of Control together with CLP Power, and supports reliability in CLP Power’s supply area through generation assets such as Black Point, Castle Peak and Penny’s Bay. CAPCO’s credit quality is supported by the Hong Kong SoC framework for recovering costs, fuel costs and permitted returns, integration with CLP Power, and official ratings of S&P AA- / Moody’s A1. However, it is not a Hong Kong Government-guaranteed bond, and CAPCO standalone financials, ANFA covenants, and the guarantee terms, bond terms and market price of Castle Peak Power Finance bonds require individual verification.

13. Sources

• CLP Holdings, 2025 Annual Report - Financials, dated 2026-02-26: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-3-financial-reports/2025/e_2025E113.pdf.coredownload.pdf
• CLP Holdings, 2025 Annual Report - Financial Review, dated 2026-02-26: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-3-financial-reports/2025/e_2025E107.pdf.coredownload.pdf
• CLP Holdings, 2025 Annual Report - Business Performance and Outlook, dated 2026-02-26: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-3-financial-reports/2025/e_2025E109.pdf.coredownload.pdf
• CLP Holdings, 2025 Annual Report - Governance, dated 2026-02-26: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-3-financial-reports/2025/e_2025E108.pdf.coredownload.pdf
• CLP Holdings, 2025 Annual Results Presentation, dated 2026-02-26: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-2-results---presentations/2025/CLP%202025%20Annual%20Results%20Presentation_.pdf.coredownload.pdf
• CLP Holdings, Quarterly Statement 2026 January-March, dated 2026-05-18: https://www.clpgroup.com/content/dam/clp-group/channels/investor/document/3-3-financial-reports/2026/e_1st%20Quarterly%20Statement%20(announcement%20version)_final.pdf.coredownload.pdf
• CLP Holdings, Credit Ratings page, accessed 2026-05-18: https://www.clpgroup.com/en/investor-relations/investor-information/credit-ratings.html
• CLP Holdings, Black Point Power Station page, accessed 2026-05-18: https://www.clpgroup.com/en/about/our-business/assets-and-services/hong-kong/black-point-power-station.html
• CLP Holdings, Castle Peak Power Station page, accessed 2026-05-18: https://www.clpgroup.com/en/about/our-business/assets-and-services/hong-kong/castle-peak-power-station.html
• CLP Holdings, Penny's Bay Power Station page, accessed 2026-05-18: https://www.clpgroup.com/en/about/our-business/assets-and-services/hong-kong/penny-s-bay-power-station.html
• CLP Holdings, 2025 Annual Report Highlights, dated 2026: https://www.clpgroup.com/content/dam/clp-group/channels/media/document/2026/2025AR_highlights_en.pdf
• CLP Power Hong Kong, Scheme of Control Agreement page, accessed 2026-05-18: https://www.clp.com.hk/en/about-clp/scheme-of-control/agreement
• CLP Power Hong Kong, 2018 Scheme of Control Agreement, dated 2018-04-25: https://www.clp.com.hk/content/dam/clphk/documents/about-clp-site/corporate-information-site/scheme-of-control-site/new_CLP_SCA_eng.pdf
• Hong Kong Government, 2024-28 Development Plans of two power companies and 2023 Interim Review on Scheme of Control Agreements, dated 2023-11-28: https://www.info.gov.hk/gia/general/202311/28/P2023112800659p.htm
• CLP Power Hong Kong, 2026 Electricity Tariff Adjustment Presentation, dated 2025-11-18: https://www.clp.com.hk/content/dam/clp-group/channels/media/document/embedded_pdfs_en/CLP%202026TR%20Pack_EN.pdf
• CLP Power Hong Kong, 2026 tariff FAQ, accessed 2026-05-18: https://www.clp.com.hk/content/dam/clphk/documents/tariff-adjustment-2026/FAQ_EN.pdf

14. Unconfirmed Items / Next Review

• CAPCO standalone audited financial statements, operating cash flow, cash balance, short-term debt and committed lines.
• CAPCO’s ANFA, current total debt / ANFA covenant level, headroom, and any waiver or amendment.
• Offering Circular, final terms, ISIN, outstanding amount, guarantee language, ranking, negative pledge, cross default, change of control, tax gross-up, events of default, governing law and listing market for Castle Peak Power Finance / CASPEA.
• Whether the CAPCO guarantee is accompanied by a guarantee from CLP Power or CLP Holdings. This report does not conclude that such a guarantee exists at present.
• Latest full reports from S&P and Moody’s, standalone assessment, downgrade / upgrade triggers and adjusted credit metrics.
• Latest generation volumes, utilisation rates, forced outages, maintenance costs and asset-level investment plans for Black Point, Castle Peak and Penny’s Bay.
• Clean price, yield, OAS, Z spread, G spread and liquidity of the 2030 notes, and comparison with same-tenor CLP Power / HK Electric / Singapore Power / Hong Kong government-related bonds.