The stock witnessed unusually high activity during the session as traders rushed to cover short positions amid rising prices and mounting margin pressure.
According to Apurva Sheth, Head of Market Perspectives and Research at Samco Securities, the counter had already been under close watch because it was nearing its market-wide position limit (MWPL), a key derivatives market indicator that tracks total exposure allowed in a stock.
“SAIL counter was in limelight today as it was on the verge of hitting its MWPL,” Sheth said.
MWPL, or Market Wide Position Limit, refers to the maximum derivatives exposure permitted in a stock across all market participants. The mechanism is designed to cap excessive speculation and concentration risk in individual counters.
Sheth said a sharp rise in MWPL usage often indicates heavily crowded positioning in futures and options contracts. In SAIL’s case, derivative exposure had become unusually concentrated among a handful of traders.
“The chart shows 14 clients holding 99.51% of the total derivative positions, with one client contributing close to 10% of the total limit individually,” he said, adding that this pointed to “an overly concentrated trade by a few individuals which might be operating in tandem with each other.”Such concentrated bearish trades can become highly vulnerable when stock prices begin moving in the opposite direction.
According to Sheth, that is precisely what unfolded during Tuesday’s trading session.
The stock’s sharp upward move likely triggered stop losses for short sellers, forcing them to buy back shares and futures contracts to limit losses. That additional buying pressure further accelerated the rally.
“In leveraged markets, positioning itself can become fuel for price action,” Sheth said.
Analysts explained that the rally followed the classic mechanics of a short squeeze. Traders initially build aggressive short futures positions expecting prices to decline. As more participants crowd into the same bearish trade, MWPL utilisation rises sharply. When the stock unexpectedly moves higher, leveraged traders face margin calls and risk-management triggers, forcing rapid short covering.
That forced buying creates a feedback loop that pushes prices even higher in a short span of time.
“The key takeaway is not just that SAIL rallied sharply, but that the rally was intensified because too many traders were positioned on the bearish side at the same time,” Sheth added.
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The sharp move in SAIL also highlights broader concerns around concentrated positioning in the derivatives market, especially in highly liquid PSU and commodity-linked stocks, where speculative participation tends to increase rapidly during volatile phases.
(Disclaimer: Recommendations, suggestions, views and opinions given by the experts are their own. These do not represent the views of Economic Times)
