The Curious Case of Market Coupling, IEX & the Whale Trade
At the start on 24th July 2025 in Indian markets, the familiar routines of investors were disrupted by a new and formidable development: Market Coupling of volume by power exchanges. The Indian Energy Exchange (IEX), normally a reliable fixture, found itself at the center of growing uncertainty. With each regulatory announcement, participants readied themselves for what lay ahead, wondering how IEX would navigate these fresh challenges.
We have observed that on more than five occasions such wispier and regulatory orders, this time have created intense volatility in the stock. The regulatory order on implementation on 24th July 2025 on market coupling has set the Cat let lose among pigeons. Interesting all this chaos, as per government study is for meager a saving of Rs 38Crs for Day Ahead Markets (DAM) and Rs 72 Lakh for Real Time Markets (RTM) for study of four months period.
Flashback Sequence: Five Market-Coupling Issues and trading Impact
Let’s rewind and take a look at the hits that knocked IEX off its saddle:
MWPL (Market-Wide Position Limit) works like a border-check — the moment open interest goes above 95%, the stock is banned. The whale can’t add new shots, only reduce them. Until the ban lifts, he’s stuck in a tight script.
Amongst all this chatter and chaos, a whale trader has enjoyed this ride on many occasions, jolting short term investors. In the backdrop, a calm trader makes a strike with a massive move as the options premium witnesses a minimum 30X jump overnight. The cash market saw Over 460Mn shares traded in two days with mere 25.0% shares marked for delivery. This wasn’t just a regular scene; it had setup, tension, and a lead player pulling strings — like the unseen hand behind the chaos. The trade set up was far more interesting as the whale kept buying and selling intraday at small differences navigating a tight rope making price severe fluctuation stagnant. Why? Because if IEX’s price rose much, short positions would be worth less than peak. The whale didn’t want the crowd to cheer; he needed silence and stillness. It is equally interesting to see the shareholders of other power exchanges.
This whale isn’t just playing for today. He’s waiting for the perfect time to unwind — like Gabbar waiting for Holi to end. As market coupling inches closer to reality, and IEX stays in the F&O spotlight, the unfolding of final act will be very interesting. With heightened volatility, strategic maneuvers by major traders, and evolving regulatory dynamics shaping the landscape, the next few weeks of trading sessions promise to be particularly interesting for IEX. As the dust continues to settle from recent market events, both seasoned investors and new participants will be closely watching to see how IEX's fundamentals and market forces interact. The coming days may reveal fresh opportunities and pivotal moves, making this period a compelling chapter in IEX’s ongoing story. Moral of the story is that it looks IEX stock price has is finally decoupling from the market coupling.
(Manish Bhandari is CEO of Vallum Capital Advisors, based in Mumbai)
