Short Squeeze
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Which heavily shorted stocks also have options leaning to calls? Four plain conditions: shares sold short, call-heavy volume, rich implied volatility and unusual call buying. Each stock shows how many it meets.
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The four conditions, exactly
| Condition | Met when | What it tells you |
|---|---|---|
| Heavily shorted | 5% or more of the float sold short and 3 or more days to cover | many shares would have to be bought back, and not quickly |
| Call-leaning | put volume at or under 0.7 of call volume today | traders are buying more calls than puts |
| Rich volatility | 30-day implied volatility at least 1.2 times 30-day realised volatility | options are priced for more movement than the stock has made |
| Unusual calls | at least one call contract with 500 or more traded and 3 times its open interest | an unusually large new call position today |
- A count, not a score. A stock gets one point per condition met, from 0 to 4. A condition with no data is not counted as met.
- Thresholds are round numbers chosen so that about one stock in 70 meets all four. See short interest, options flow and short squeeze in the glossary.
Change the lines yourself in the Screen Builder, which has the same four measures.
What this can't do
- It does not predict a squeeze. Most heavily shorted stocks with call buying do not squeeze, and some squeezes start with none of these signs.
- Short interest is old. FINRA publishes twice a month with a delay, so the figure can be two weeks behind a position that has since changed.
- Call volume is not direction. A call bought can be a hedge or part of a spread. Unusual flow is a size test, not a view.
- Options data is delayed and comes from an unofficial public feed.
- Small or thin stocks are mostly absent. The page covers the stocks this site tracks, not the heavily shorted small caps where squeezes are most often reported.
On Nov 1, 2026, 7 of the 500 stocks this site tracks meet all four squeeze conditions (5% of float or more sold short with 3 or more days to cover, call-leaning options volume, implied volatility 1.2x realised or more, and unusual call buying) and 56 meet at least three. Mosaic (MOS) is the most shorted of those, at 10.7% of float. This describes positioning today and does not predict a squeeze.
Which Stocks Meet
The Conditions?
Each row shows the four signals as dots, then the numbers behind them. Filled red means the condition is met, a grey dashed dot means no data. Click any row for the full stock card.
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Which Stocks Meet
Three Of Four?
The near misses, with the most heavily shorted first. The grey outline shows which condition each is missing, so you can see whether it is the shorts, the options or the volatility that falls short.
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Which stocks show the most short squeeze conditions?
On Nov 1, 2026, 7 of the 500 stocks this site tracks meet all four squeeze conditions (5% of float or more sold short with 3 or more days to cover, call-leaning options volume, implied volatility 1.2x realised or more, and unusual call buying) and 56 meet at least three. Mosaic (MOS) is the most shorted of those, at 10.7% of float. This describes positioning today and does not predict a squeeze.
| Stock | Conditions met | Short % of float | Days to cover | Put/call volume | Implied / realised | Unusual calls |
|---|---|---|---|---|---|---|
| MOSMosaic Co | 4 of 4 | 10.7% | 3.3 | 0.17 | 1.38x | 1 |
| CDWCDW Corp | 4 of 4 | 7.2% | 6.1 | 0.07 | 1.42x | 1 |
| GPNGlobal Payments Inc | 4 of 4 | 6.7% | 7.5 | 0.69 | 1.28x | 1 |
| SNOWSnowflake Inc | 4 of 4 | 5.4% | 4.4 | 0.61 | 1.24x | 3 |
| FISVFiserv Inc | 4 of 4 | 5.4% | 5.2 | 0.54 | 1.92x | 1 |
| SYFSynchrony Financial | 4 of 4 | 5.3% | 5.5 | 0.02 | 1.24x | 1 |
| TTWOTake-Two Interactive Software Inc | 4 of 4 | 5.2% | 3.8 | 0.52 | 2.15x | 1 |
| FOXAFox Corp | 3 of 4 | 24.6% | 13.8 | 0.23 | 1.50x | 0 |
| ECHOEchoStar Corp | 3 of 4 | 17.8% | 5.3 | 0.50 | 1.20x | 0 |
| CHTRCharter Communications Inc | 3 of 4 | 15.7% | 5.9 | 0.57 | 1.66x | 0 |
The tool above lists every stock with the four signals and the three-month change in shorts. Short interest and the put/call ratio are defined in the glossary.
Short interest from FINRA; options from delayed Cboe data; float from Finnhub where reported. Educational content only, not investment advice.
Frequently asked questions
What is a short squeeze?
A short squeeze is a fast price rise forced by short sellers buying shares back to close their positions, which pushes the price up and forces more of them to buy. It needs a lot of shares sold short and a trigger, and it is rare. Heavy short interest alone does not mean a squeeze is coming.
What are the four conditions on this page?
Heavily shorted: at least 5% of the float sold short and at least 3 days to cover. Call-leaning: put volume at or under 0.7 of call volume. Rich volatility: 30-day implied volatility at least 1.2 times realised volatility. Unusual calls: at least one call contract trading 500 or more with 3 times its open interest. A stock meets a condition when its number crosses the line.
Does meeting all four conditions mean a squeeze is coming?
No. The page counts how many conditions a stock meets today. It describes positioning, which can change in a day, and most stocks that meet all four do not squeeze. Many heavily shorted stocks fall or go nowhere, and a stock can squeeze without meeting any of them.
How old is the short interest data?
FINRA publishes short interest twice a month with a delay of about a week, so it can be two weeks behind. Options data is delayed and refreshed weekly on this site. The footnote under the list shows the dates.
Which stocks could short squeeze? About this watch list
This short squeeze watch counts how many of four conditions each stock meets: heavy short interest with days to cover, a call-leaning put/call ratio, implied volatility above realised, and unusual call volume. It describes positioning today and does not predict a squeeze. Next, see the short interest screener, the options flow or rank the same measures in the Screen Builder.
Educational content only, not investment advice. These are screens built from public filings, not verdicts: a high score does not make a stock safe, and a low one does not make it a bad investment. Always read the company's own 10-K before acting on anything shown here. See Editorial Standards and Disclosures for more.