Short Interest
The percentage of a stock's available shares currently sold short — a direct read on how much the market is betting against it.
Short interest is the percentage of a stock's float (its publicly tradeable shares) that has been sold short — borrowed and sold by traders betting the price will fall (see the Long vs. Short Selling lesson on the Technical Analysis track for the underlying mechanics). InsiderWolf shows this directly on every ticker page's ownership section, alongside a plain-language read of what the level actually means.
It's a genuinely two-sided signal: a high short interest reflects real bearish conviction from sophisticated traders willing to take on a position with theoretically unlimited risk — but it's also the specific fuel a short squeeze needs, since a wave of forced buying from short sellers covering their positions can send a heavily-shorted stock sharply higher with no change in the underlying business.
A high short interest can resolve in either direction: the bears can simply be right, and the stock grinds lower as the thesis plays out with no dramatic squeeze at all — or a squeeze can happen and reverse it sharply, regardless of whether the original bearish thesis was actually sound. The level tells you how much conviction and squeeze fuel exists; it doesn't tell you which outcome is more likely.
- Short interest is a measure of positioning and potential volatility, not a prediction of direction — treat it as context for a thesis, not a thesis by itself.
- A short squeeze requires a trigger (good news, a broad market rally) on top of the high short interest itself — the high short interest alone is necessary but not sufficient.
- Short interest is typically reported with a lag, so the number reflects positioning as of the last reporting date, not necessarily right now.