Short Selling

Short selling rested on a simple mechanism: borrow shares from an existing owner, sell them in the market at the current price, and later purchase the same shares from the market to return to the lender — pocketing the difference if prices declined. The short seller profited when prices fell and incurred a loss when prices rose. Unlike a long position where maximum loss was limited to the invested capital, a short position had theoretically unlimited loss potential because share prices could rise indefinitely.

In India's regulatory framework, SEBI governed short selling through specific rules. Retail investors in the cash equity segment were not permitted to create naked short positions that carried overnight — intraday short selling (selling without owning, then buying back before market close on the same day) was permitted for cash market participants through most brokers, effectively constituting BTST (Buy Today Sell Tomorrow) in reverse. True short selling — maintaining an open short position overnight in the cash equity segment — required using the SLBM (Securities Lending and Borrowing Mechanism) to borrow the shares before selling.

In practice, the most liquid and widely used avenue for short selling in India was the derivatives market, specifically futures contracts. A trader bearish on a specific stock or the Nifty 50 index could sell a futures contract without owning the underlying, effectively expressing a short view with leverage. Options strategies (buying put options) offered another avenue for bearish positioning with defined maximum loss. The futures and options market in India was therefore the primary venue for institutional short interest.

SEBI had introduced transparency requirements mandating that stock exchanges disclose aggregate short positions on scrips, distinguishing between short selling and genuine short-delivery. This data was published to help detect potential settlement failures. SEBI also prohibited naked short selling by institutional investors — they were required to confirm at the time of placing a sell order whether it was a long sell (from existing holdings) or a short sell (borrowing via SLBM).

Historically, short sellers in Indian markets had faced headwinds from market-wide circuit breakers, SEBI's surveillance mechanisms, and the relative difficulty of borrowing shares through the SLBM due to low participation. However, short selling served an important price discovery function by incorporating negative information into stock prices, improving market efficiency and preventing valuations from disconnecting excessively from fundamentals.