Most Shorted Stocks Today: May 20, 2026 — Top 25 Squeeze Candidates
ENVB tops Tapeboard's most-shorted-stocks board on May 20, 2026 with a perfect 100 squeeze score, anchored by a 260.1% annualized borrow fee against 45.7% short interest and 0.1 days to cover.
ENVB again leads Tapeboard's most-shorted-stocks board on May 20, 2026 with a perfect 100 squeeze score, driven by an outlier 260.1% annualized borrow fee against 45.7% short interest and just 0.1 days to cover. Twenty of the top 25 names carry the FINRA threshold flag for sustained heavy short-side volume, and eight tickers — led by GRPN (59.2%) and RH (55.8%) — show short interest above 35% of float. Outside the ENVB outlier, fees stay mostly tame, so today's pressure is again driven by crowded positioning rather than broad stock-loan stress.
May 20, 2026 Top 25 Short Squeeze Candidates
| Rank | Symbol | Squeeze Score | SI % Float | Borrow Fee | Days to Cover | T |
|---|---|---|---|---|---|---|
| 1 | ENVB | 100 | 45.7% | 260.1% | 0.1 | |
| 2 | GRPN | 94.2 | 59.2% | 1.1% | 6.7 | T |
| 4 | RH | 81 | 55.8% | 0.4% | 3.2 | T |
| 5 | CLSK | 78.4 | 49.5% | 0.3% | 4.5 | T |
| 6 | RXRX | 72.4 | 34.2% | 0.9% | 15.0 | T |
| 7 | NVAX | 72.1 | 30.3% | 0.4% | 15.6 | T |
| 8 | BTDR | 70.2 | 34.7% | 0.8% | 8.2 | T |
| 9 | NTLA | 70.1 | 39.3% | 0.4% | 6.8 | T |
| 11 | AI | 69.2 | 35.2% | 0.4% | 10.2 | |
| 12 | IBRX | 69.1 | 35.6% | 6.2% | 9.3 | T |
| 13 | EVGO | 68.5 | 33.5% | 0.7% | 11.9 | T |
| 14 | PLAY | 65.2 | 34.0% | 0.5% | 4.5 | |
| 15 | INDI | 65.2 | 29.4% | 2.9% | 13.4 | T |
| 16 | PCRX | 65.1 | 28.6% | 0.4% | 14.9 | T |
| 18 | LCID | 63.5 | 35.8% | 10.7% | 3.0 | T |
| 19 | CSIQ | 63.5 | 31.4% | 0.9% | 6.7 | T |
| 20 | ARCT | 63.5 | 28.2% | 0.5% | 15.5 | T |
| 21 | TRIP | 62.7 | 31.9% | 0.4% | 9.1 | T |
| 22 | UPST | 62.1 | 32.3% | 0.4% | 6.2 | T |
| 23 | BEAM | 60.9 | 31.5% | 0.3% | 9.7 | T |
| 24 | PRME | 60.7 | 21.5% | 0.4% | 16.4 | T |
| 25 | CRSP | 60.2 | 26.7% | 0.5% | 12.9 | T |
| 26 | ASAN | 59.9 | 30.9% | 0.5% | 4.5 | T |
| 27 | TGTX | 59.5 | 25.5% | 0.3% | 14.9 | |
| 28 | IOVA | 59.5 | 27.5% | 0.4% | 8.1 |
Top 5 Short Squeeze Setups for May 20, 2026
1. ENVB — Squeeze Score 100
ENVB is the only triple-digit borrow on the board at 260.1% annualized, paired with 45.7% short interest, 0.1 days to cover, and float utilization of 24.6%. Shares closed at $2.21 and are off 3.1% over the last five sessions. This is a tight-float biotech in acute stock-loan stress: with a sub-day coverage window, average daily volume cannot absorb a forced cover without shorts bidding directly for stock. ENVB is not threshold-flagged today, so the pressure lives entirely in the borrow market rather than on the tape. If borrow availability tightens further or a single block buyer steps in, there is no supply cushion to dampen the move.
2. GRPN — Squeeze Score 94.2
GRPN carries the highest raw short interest on the leaderboard at 59.2% of float, with float utilization at 57.1% — more than half of stock-loan inventory is already out on loan. Borrow fee stays modest at 1.1%, days to cover sits at 6.7, five-day momentum is +6.2%, and price closed at $17.80. Threshold-flagged. The setup is a crowded short on a name already grinding higher: short interest is structurally elevated and the borrow desk is approaching its supply ceiling. If utilization breaks into the 70-80% band, fee rates can reprice in a single session, and that fee move itself becomes a forcing function for the fee-sensitive part of the short book.
3. RH — Squeeze Score 81
RH prints 55.8% short interest with 38.1% float utilization, a still-cheap 0.4% borrow fee, and 3.2 days to cover at a $139 close. Five-day momentum is +8.8% and the threshold flag is on. This is the cleanest short squeeze mechanic on the board today: a heavily-shorted consumer name that is already moving up while the borrow desk has not yet repriced. The 3.2 days-to-cover figure is the load-bearing number here — at recent volume, the existing short book cannot exit in a single session without driving price. A continuation of the five-day uptrend forces the gross-exposure shorts to choose between paying up to cover and absorbing mark-to-market losses through earnings.
4. CLSK — Squeeze Score 78.4
CLSK shows 49.5% short interest, 40.4% float utilization, a 0.3% borrow fee, and 4.5 days to cover with shares at $15.83. Five-day momentum is the strongest on the board at +12.7%, and the threshold flag is on. This is a high-beta crypto-adjacent name in an active uptrend with a deeply crowded short book — classic squeeze geometry. The borrow fee has not yet repriced to match the short interest, which means the position is still cheap to carry. If utilization pushes through the mid-50s, the fee revaluation alone can compress the short book; combined with a continued bid in underlying crypto markets, the days-to-cover math leaves little room to exit cleanly.
5. RXRX — Squeeze Score 72.4
RXRX carries 34.2% short interest with 33.4% float utilization, a 0.9% borrow fee, 15.0 days to cover, and a $3.11 close on +2.3% five-day momentum. Threshold-flagged. The dominant variable here is days to cover — at 15.0 sessions, exiting the short book at recent volume would require roughly three trading weeks. That coverage runway is what gives a single positive catalyst real price leverage in AI-drug-discovery names: shorts cannot simply step aside, they have to bid for stock over multiple sessions. The borrow fee is still benign, so today's risk is operational rather than financial — a tape-driven move, not a fee-driven one.
What the T Flag Means
The "T" column marks names on the FINRA Consolidated NMS short-volume threshold list — symbols where short-side volume has accounted for more than 50% of total reported volume on the lit tape across recent trading days. It is a sustained-pressure signal rather than a single-day reading, and it is independent of reported short interest. Full scoring detail is at /methodology/short-squeeze-score.
How the Tapeboard Squeeze Score Is Built
The 0-100 squeeze score blends five inputs: 35% short interest as a percent of float (Yahoo), 25% borrow fee (IBKR via iborrowdesk), 20% float utilization, 15% days to cover, and 5% 5-day price momentum (Schwab). Weights are tuned so that no single dimension can dominate — a triple-digit fee like ENVB's still has to clear the other gates to reach 100. Full methodology and the raw weight table are at /methodology/short-squeeze-score.
The live ranking refreshes every trading session — see the live leaderboard for tomorrow's update.