What it is
A short squeeze happens when a stock with a high amount of short interest experiences an unexpected upward price movement. This forces short sellers, who had bet on the stock falling, to buy back shares to limit their potential losses. This buying activity, often done quickly to avoid greater losses, creates additional demand for the stock, further driving up its price in a self-reinforcing cycle.
Short squeezes are often triggered by positive news, an unexpected earnings beat, or general market enthusiasm for a heavily shorted stock. Retail investors frequently participate in identifying and driving short squeezes, particularly with meme stocks. The mechanics involve short sellers liquidating their positions, which means buying shares, thereby adding upward pressure on the stock's price, sometimes dramatically.
Why it matters
A short squeeze can cause extreme and rapid price increases in heavily shorted stocks, presenting both opportunities and significant risks for investors.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice