CERC directions on market coupling of power exchanges (Petition 8/SM/2025, July 2025)
Where it stands: Directions issued July 2025; draft Power Market (Second Amendment) Regulations 2026 published April 2026 and heard June 2026; not yet notified or implemented
CERC directed in July 2025 that bids from all three power exchanges be pooled and cleared as one day-ahead market, targeting January 2026; that target was missed, and CERC's April 2026 draft Power Market regulations now make Grid-India the sole market coupling operator with the go-live date to be notified, which would end IEX's near-monopoly on price discovery and create a single national day-ahead price.
The problem
India has three power exchanges but the Indian Energy Exchange clears more than 90 percent of day-ahead volume, so liquidity, and therefore price discovery, sits on one private platform while the other two struggle. The Power Market Regulations 2021 provided for market coupling, and the Ministry of Power pushed CERC to implement it so that a single clearing price could underpin the planned national market, security-constrained economic dispatch and derivatives.
What it does
After a 2023 discussion paper, a shadow-pilot study by Grid-India in 2024 and hearings, CERC issued directions on 23 July 2025 (suo motu Petition 8/SM/2025) for the coupling of the day-ahead market (the integrated DAM, including the green DAM) across IEX, PXIL and HPX, targeting January 2026. Under coupling, all buy and sell bids from the three exchanges are aggregated and cleared by a single market coupling operator to produce one market clearing price and volume, with each exchange continuing to onboard members and settle. The July 2025 directions envisaged the exchanges acting as coupling operator in rotation with Grid-India as back-up and auditor, but the draft CERC (Power Market) (Second Amendment) Regulations 2026, published on 17 April 2026 and heard on 10 June 2026, designate Grid-India as the sole market coupling operator through a dedicated cell and leave the effective date of coupling to be notified separately, with Grid-India to draft the coupling procedure within six months of notification. Real-time and other segments may be coupled from dates notified later. APTEL disposed of IEX's appeal against the directions on 13 February 2026, holding that IEX was not a person aggrieved, with liberty to challenge the regulations once made.
Market effect
A single coupled price removes the small but real price differences between exchanges and concentrates liquidity, which improves the reference price for bilateral contracts, for the green DAM premium and for any future electricity derivatives on the commodity exchanges. It also strips IEX of the network effect that let it dominate volumes and charge full transaction fees: IEX's share price fell sharply on the order, and exchanges will compete on fees and services rather than liquidity. For discoms and traders the day-ahead price becomes more robust and harder to influence, and the coupled DAM is the building block for a unified national market with security-constrained economic dispatch. Real-time market coupling, once done, would extend this to intraday balancing. The change is structural rather than directional for price levels; the main risks are further slippage of the go-live date, operational disruption during the transition and litigation once the regulations are notified.
Key numbers
- Directions issued
- 23 July 2025 (suo motu Petition 8/SM/2025)
- Go-live for coupled DAM
- Targeted January 2026; not achieved, effective date to be notified after the regulations are made
- IEX day-ahead share before coupling
- About 99 percent of volume (October 2025)
- Coupling operator
- Grid-India as sole operator (draft regulations, 17 April 2026); round-robin with the exchanges dropped
Who gains and who pays
- Indian Energy Exchange (costs): Loses liquidity advantage and pricing power; competes on fees and members.
- PXIL and HPX (gains): Access to the pooled order book on equal terms.
- Grid-India (obligation): Designated sole market coupling operator in the draft regulations; must build the coupling cell, algorithm and settlement interface.
- Discoms, traders and open-access consumers (gains): One national day-ahead price and deeper liquidity.
- Renewable and storage sellers in the green DAM (gains): Consolidated green market improves price discovery for the green premium.
Implementation
The January 2026 target was not met. CERC's draft Power Market (Second Amendment) Regulations 2026 (comments to 5 June 2026, public hearing 10 June 2026) create the market coupling operator framework; as of September 2026 the regulations had not been notified and the day-ahead market is still cleared separately by each exchange. Once notified, CERC must separately notify the coupling date and Grid-India must prepare the coupling procedure within six months. Real-time market coupling follows later, and the Ministry of Power has linked coupling to the one-nation-one-grid-one-price objective and to electricity derivatives.
Concerns
- Operational and settlement risk during transition to the coupled clearing
- Litigation by IEX over the order and the coupling design
- Exchange competition weakening if fees converge to zero
- Design of real-time market coupling and interaction with SCED
- Whether coupling delivers lower prices or merely redistributes exchange revenue
Dates to watch
- 2026-H2: Notification of the Power Market (Second Amendment) Regulations 2026 and the day-ahead coupling date
- 2027: Grid-India coupling procedure (within six months of notification) and first coupled day-ahead operation; later decision on real-time coupling
Sources
- CERC: directions on market coupling, suo motu Petition 8/SM/2025 (23 July 2025), Central Electricity Regulatory Commission (official text)
- CERC: draft (Power Market) (Second Amendment) Regulations, 2026 (17 April 2026), Central Electricity Regulatory Commission
- CERC: corrigendum to the 23 July 2025 order (read as directions), 8 January 2026, Central Electricity Regulatory Commission
- CERC: draft regulations listing (comments and hearing dates), Central Electricity Regulatory Commission
Checked against sources on .