Definition
Short Covering
Short covering is when price rises while open interest falls, as traders buy back short positions to close them.
When a price rises but open interest declines, it usually means existing short sellers are buying back to exit — short covering — rather than fresh longs entering. These bursts can be sharp because trapped shorts rush to cover, fuelling a quick rally that may fade once covering is done.
Indian F&O traders watch for short covering on the NSE to distinguish a genuine bullish trend (a long build-up) from a temporary squeeze. A rally driven mainly by short covering, with falling OI, is treated with more caution than one backed by fresh long build-up.
Related terms
- Open InterestOpen interest is the total number of outstanding futures or options contracts that have not yet been closed.
- Long Build-upA long build-up is when both price and open interest rise together, signalling fresh buying and bullish positioning.
- Short Build-upA short build-up is when price falls while open interest rises, signalling fresh selling and bearish positioning.
- Long UnwindingLong unwinding is when price falls while open interest falls, as existing long holders book profits or exit.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.