How electricity trading happens in India, and why a restructuring is on the cards

The transition to market coupling represents a shift from a fragmented pricing model to a centralized mechanism designed to maximize economic surplus (the sum of buyer and seller surplus). Currently, India's short-term power market relies on multiple exchanges—dominantly the India Energy Exchange (IEX)—which independently match bids and offers, leading to different market-clearing prices across platforms for the same electricity delivery period. By appointing Grid Controller of India to aggregate all bids and run a single price discovery algorithm, the Central Electricity Regulatory Commission aims to establish a uniform, reliable reference price. This reform is expected to enhance liquidity, improve transmission corridor utilization, and lower procurement costs for Distribution Companies (DISCOMs). However, it threatens the competitive advantage and market share of dominant players like IEX, which currently benefits from high liquidity on its platform.

This regulatory intervention by the Central Electricity Regulatory Commission (CERC) highlights the role of statutory bodies in shaping market architecture under the Electricity Act, 2003. The draft Central Electricity Regulatory Commission (Power Market) (Second Amendment) Regulations, 2026 proposes empowering Grid Controller of India as the Market Coupling Operator (MCO). This shift necessitates establishing detailed protocols, specifically the Power Market Coupling Procedure (PMCP), to standardize bid formats and coordinate secure data transmission between the MCO and the existing exchanges. The process underscores a governance challenge: balancing market efficiency through centralization against the concerns of established private platforms whose business models rely on proprietary price discovery. The phased implementation—starting with the Day-Ahead Market (DAM) and potentially expanding to the Real-Time Market (RTM)—reflects a calibrated approach to structural reform.

Understanding the mechanics of electricity trading is crucial for assessing India's energy infrastructure transition. While long-term Power Purchase Agreements (PPAs) (typically 25-year contracts) dominate the sector, the short-term market is growing rapidly, driven by the need to manage demand fluctuations and integrate variable renewable energy. The short-term market includes various segments based on delivery timing: the Spot Market encompasses the Real-Time Market (RTM) for near-immediate delivery and the Intraday Market; the Day-Ahead Market (DAM) involves closed auctions for 15-minute blocks for the next day; and the Term-Ahead Market (TAM) handles trades up to 11 days in advance. The proposed market coupling will optimize the dispatch of generation capacity across these short-term segments, ensuring that the cheapest available power across all exchanges is utilized first, thereby improving the overall operational efficiency of the national grid.