Market Coupling Operator proposed for power trading: Sole MCO plan gets pushback from Grid India, IEX

The Central Electricity Regulatory Commission (CERC) has proposed the Draft CERC (Power Market) (Second Amendment) Regulations, 2026, seeking to introduce ma...

What Happened

The Central Electricity Regulatory Commission (CERC) has proposed the Draft CERC (Power Market) (Second Amendment) Regulations, 2026, seeking to introduce market coupling for electricity trading in India.
Under the proposal, Grid Controller of India Limited (Grid India) would be designated as the sole Market Coupling Operator (MCO), responsible for aggregating bids from all power exchanges and determining a single, uniform market-clearing price (MCP) for electricity.
The proposal has drawn pushback from two key institutional stakeholders: Grid India itself (raising operational concerns about being designated the MCO) and the Indian Energy Exchange (IEX), which dominates the spot power market with the largest share of traded volumes.
IEX has flagged that centralised price discovery would erode competition between exchanges, dilute price signals, and undermine investment in trading platforms. Shares of IEX fell over 6% upon announcement.
Market coupling would initially cover the Day-Ahead Market (DAM) and later be extended to the Real-Time Market (RTM) and other segments.

Static Topic Bridges

Market Coupling: Concept and Global Practice

Market coupling is a mechanism in electricity markets where buy and sell bids from multiple power exchanges are pooled and processed by a central operator to determine a single market-clearing price (MCP) across all exchanges simultaneously. This replaces the current fragmented system where each exchange independently discovers prices, which can result in price divergence, arbitrage inefficiency, and sub-optimal use of transmission capacity.

Market coupling has been adopted in the European Union's internal electricity market (since 2014, under the Price Coupling of Regions or PCR initiative) and is credited with improving cross-border price convergence and grid utilisation.
The key efficiency argument: when two exchanges set different prices for the same delivery period, traders arbitrage the gap, but this arbitrage is constrained by transmission capacity limits — market coupling allocates that capacity optimally as part of the price discovery process itself.
India currently has two active power exchanges: Indian Energy Exchange (IEX) and Power Exchange India Limited (PXIL). A third, Hindustan Power Exchange, is also licensed.
IEX dominates the market with over 95% of traded volumes, making it the primary player affected by market coupling reform.

Connection to this news: The CERC proposal would fundamentally reshape how electricity prices are discovered in India — from a competitive, exchange-driven model to a centralised, operator-driven model — triggering a structural debate about efficiency versus competition.

Power Market Segments: DAM, RTM, and Beyond

India's short-term electricity market operates through multiple segments with different delivery timelines, each serving distinct purposes in grid balancing.

Day-Ahead Market (DAM): Electricity contracts for delivery the following day, cleared through auction. This is the largest segment by volume.
Real-Time Market (RTM): Introduced by CERC in 2020; electricity contracts for delivery within 30 minutes to 4 hours. Enables rapid grid balancing to handle renewable energy intermittency.
Term-Ahead Market (TAM): Contracts ranging from intra-day to 11 days ahead.
Green Day-Ahead Market (GDAM): Dedicated market for renewable energy transactions, promoting clean energy integration.
Long-Term and Medium-Term contracts: Negotiated through Power Purchase Agreements (PPAs) outside the exchange platform.
Market coupling under the CERC proposal would initially apply to DAM, then extend to RTM — covering the two highest-volume segments.

Connection to this news: Understanding the DAM/RTM distinction is essential for UPSC aspirants because CERC's regulatory interventions in these segments directly affect the cost of power procurement by state distribution companies (DISCOMs) — and by extension, electricity tariffs for consumers.

CERC: Regulatory Architecture of India's Electricity Sector

The Central Electricity Regulatory Commission (CERC) is a statutory body established under the Electricity Regulatory Commissions Act, 1998, now governed by the Electricity Act, 2003. It regulates the tariffs and interstate transmission of electricity, licenses inter-state power trading, and regulates power markets.

CERC is a quasi-judicial body; its orders are subject to appeal before the Appellate Tribunal for Electricity (APTEL) and thereafter to the Supreme Court.
State Electricity Regulatory Commissions (SERCs) regulate intra-state electricity distribution and retail tariffs.
The Electricity Act, 2003 is the foundational legislation that created the CERC/SERC framework, de-licensed power generation (except atomic energy), and mandated open access to transmission networks.
Grid India (formerly POSOCO — Power System Operation Corporation Limited) manages the National Load Despatch Centre (NLDC) and five Regional Load Despatch Centres (RLDCs); it is the backbone of real-time grid balancing.
The proposed MCO role for Grid India would add a market-coordination function to its existing grid-operation mandate — which Grid India has flagged as a potential conflict of interest or operational overstretch.

Connection to this news: The institutional resistance from Grid India highlights a principle relevant to UPSC governance questions: regulatory and operational functions need clear separation to avoid conflicts of interest — the MCO debate is a live case study.

Energy Transition and the Case for Market Reform

India has set a target of 500 GW of non-fossil fuel electricity capacity by 2030 (as part of its Nationally Determined Contributions under the Paris Agreement). Renewable energy sources — solar and wind — are inherently variable and require flexible short-term markets for optimal grid integration. Fragmented price discovery undermines the efficiency of these markets.

India's renewable energy installed capacity crossed 200 GW in 2024 and is targeted to reach 500 GW by 2030.
Renewable energy creates price volatility in DAM and RTM due to its variable nature; market coupling can theoretically smooth these price spikes by optimising transmission allocation alongside bid aggregation.
The power sector faces a structural problem: state DISCOMs owe approximately Rs 1.13 lakh crore in dues to generators (as of recent estimates), creating financial stress that distorts market behavior.
Market coupling is argued to reduce the cost of power procurement by eliminating arbitrage spreads between exchanges, ultimately benefitting distribution companies and consumers.

Connection to this news: The MCO reform is thus not a technical footnote but a key policy tool in India's energy transition — directly connected to Mains themes of regulation, competition policy, and clean energy governance.

Key Facts & Data

Regulator: Central Electricity Regulatory Commission (CERC), established under Electricity Act, 2003
Proposed MCO: Grid Controller of India Limited (Grid India)
Power exchanges: IEX (dominant, ~95% volume), Power Exchange India Limited (PXIL), Hindustan Power Exchange
Regulation proposed: Draft CERC (Power Market) (Second Amendment) Regulations, 2026
Segments for coupling: Day-Ahead Market (DAM) initially, then Real-Time Market (RTM)
European precedent: Price Coupling of Regions (PCR), EU internal electricity market
IEX stock reaction: fell over 6% on announcement
Appeal body for CERC orders: Appellate Tribunal for Electricity (APTEL)
Key legislation: Electricity Act, 2003; Electricity Regulatory Commissions Act, 1998
India's renewable energy target: 500 GW by 2030 (Paris Agreement NDC)
RTM introduced: 2020 (by CERC)