Philippines regulator plans reserve market price cap after suspension

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Philippines reserve market price cap

Highlights

Energy Regulatory Commission plans to implement a secondary price cap on reserve market trading after suspending operations on Oct. 14 due to persistently high prices.
The proposed cap limits reserve prices to P14,115–P14,548 per MWh for regulated reserves and P3,216–P5,187 per MWh for other reserve types once trigger thresholds are breached.
ERC estimates show reserve market purchases raised Visayas electricity rates by P1.29 per kWh versus P0.02 per kWh for procurement agreements, justifying the new price cap.

Reserve pricing safeguards and market design

As reported by BusinessWorld, citing the Energy Regulatory Commission, it plans to impose a secondary price cap on the trading of power reserves after suspending the market because of persistently high prices. ERC Chairman and Chief Executive Officer Francis Saturnino C. Juan said in a statement at the weekend that the safeguard is being prepared ahead of the reserve market's resumption.

The proposed measure forms part of the government's plan to revise the policy and regulatory framework for ancillary services, or AS. These power reserves are used by the grid operator to support transmission and maintain grid reliability, and are procured either through the reserve market or through ancillary service procurement agreements with National Grid Corp. of the Philippines.

The reserve market began commercial operations in January 2024 with an interim offer limit of P0 to P25,000 per megawatt-hour. Similar to the Wholesale Electricity Spot Market, the draft rules would set a secondary price cap that limits price spikes once a cumulative threshold is breached.

Under the proposal, the Independent Electricity Market Operator of the Philippines would monitor average prices over a three-day period, with the monitoring window depending on the type of reserve. The cap would be triggered when the three-day average price exceeds the prescribed threshold, limiting how high prices can rise.

The draft sets the cap at P14,115 per MWh for regulating-up reserves, P14,548 per MWh for regulating-down reserves, P5,187 per MWh for contingency reserves, and P3,216 per MWh for dispatchable reserves. These limits would take effect once trigger thresholds of P15,816, P16,104.75, P8,940.89, and P7,830.07 per MWh, respectively, are breached.

Regional electricity cost impact

The regulator's review found that reserve purchases from the spot market in 2025 were higher than those sourced through ancillary service procurement agreements. According to the ERC's estimates, reserves bought from the reserve market added about P1.29 per kilowatt-hour to electricity rates in the Visayas, while those bought under procurement agreements added only P0.02 per kWh.

Those findings led the ERC to suspend reserve market operations on Oct. 14 to curb high ancillary service prices and review the rules governing the mechanism. The commission also says the caps would be triggered independently across Luzon, the Visayas, and Mindanao so that localized price spikes do not spill over to neighboring grids.

According to the ERC, the proposed cap levels are based on actual reserve prices recorded between February 2024 and December 2025. When tested against market prices from Aug. 26 to Sept. 25, 2026, the commission says the mechanism could have reduced average reserve prices by 12% to 50% in the Visayas and by 17% to 33% in Mindanao.

The ERC says the results show the cap would act only when prices remain excessive while leaving normal pricing unaffected.

Our earlier report on Philippine bond-market reforms examined the planned shift in pricing conventions for peso government bonds and the expected boost from prospective inclusion in J.P. Morgan’s Government Bond Index-Emerging Markets. It noted that while these steps can improve liquidity and broaden participation, the wider economic payoff still depends on credibility, investor trust, and structural conditions—such as addressing high operating costs like electricity prices—that ultimately shape investment decisions.

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