Most Shorted Stocks Today: October 8, 2026 — Top 25 Squeeze Candidates
On October 8, 2026, FCEL leads the most shorted stocks leaderboard with a 95.9 squeeze score, 32.7% short interest, and a 41.4% borrow fee, on a board where 19 of 25 names carry FINRA threshold flags.
FuelCell Energy (FCEL) tops the most shorted stocks board for October 8, 2026 with a squeeze score of 95.9, backed by 32.7% short interest as a percent of float, a 41.4% annualized borrow fee, and 3.9 days to cover. The board is heavily threshold-flagged today, with 19 of the top 25 names showing sustained short-side volume pressure, and elevated borrow costs concentrated in biotech and small-cap energy names. PRME (94.8) and TWST (92.3) round out the top three.
October 8, 2026 Top 25 Short Squeeze Candidates
| Rank | Symbol | Squeeze Score | SI % Float | Borrow Fee | Days to Cover | T |
|---|---|---|---|---|---|---|
| 1 | FCEL | 95.9 | 32.7% | 41.4% | 3.9 | T |
| 2 | PRME | 94.8 | 27.9% | 44.6% | 7.1 | T |
| 3 | TWST | 92.3 | 22.6% | 25.0% | 4.0 | |
| 4 | HUT | 91.2 | 16.2% | 25.0% | 3.2 | T |
| 5 | CIFR | 89.0 | 21.2% | 41.8% | 2.1 | |
| 6 | RXRX | 87.1 | 34.8% | 47.9% | 6.3 | T |
| 7 | TE | 86.0 | 34.0% | 1.7% | 3.5 | |
| 8 | WULF | 83.6 | 31.7% | 40.4% | 4.1 | T |
| 9 | SDGR | 80.4 | 19.4% | 25.0% | 3.2 | T |
| 10 | OKLO | 79.8 | 22.5% | 50.2% | 3.1 | T |
| 11 | SMR | 79.3 | 22.4% | 46.8% | 1.9 | T |
| 12 | NBIS | 79.3 | 20.5% | 33.1% | 2.9 | T |
| 13 | BIRD | 79.3 | 15.8% | 10.5% | 2.0 | T |
| 14 | CLSK | 78.7 | 31.9% | 36.0% | 4.5 | T |
| 15 | IREN | 75.3 | 24.0% | 40.9% | 2.2 | |
| 16 | ASTS | 75.1 | 24.5% | 88.6% | 5.9 | T |
| 17 | VKTX | 73.6 | 19.9% | 47.7% | 2.5 | |
| 18 | AGEN | 72.1 | 16.9% | 51.7% | 5.8 | T |
| 19 | LEU | 71.6 | 28.2% | 53.0% | 6.9 | T |
| 21 | CHPT | 69.0 | 21.6% | 3.7% | 4.1 | T |
| 22 | GENI | 69.0 | 17.8% | 41.4% | 4.5 | T |
| 23 | ARCT | 68.4 | 20.9% | 41.7% | 6.7 | T |
| 24 | ABCL | 68.0 | 16.2% | 83.3% | 6.0 | T |
| 25 | NTLA | 67.9 | 34.8% | 26.5% | 8.5 | T |
1. FCEL — Squeeze Score 95.9
FCEL leads the board with 32.7% of its float sold short, a 41.4% borrow fee, and 3.9 days to cover, and it carries a threshold flag. This is a classic high-SI, high-fee setup: shorts are paying meaningfully to stay in the position, and the stock is up 4.1% over the last five days, which adds mark-to-market pressure on top of the carrying cost. If borrow availability tightens further or the recent price strength extends, covering demand could accelerate against a float where a third of shares are already shorted.
2. PRME — Squeeze Score 94.8
PRME pairs 27.9% short interest with a 44.6% borrow fee and the longest days to cover in the top five at 7.1. The standout feature is momentum: the stock is up 19.7% over five days, the strongest move on the board, while sitting on the FINRA threshold list. This is a threshold-flagged momentum squeeze in progress. If the rally continues, shorts face both rising borrow costs and adverse price action with a slow, 7.1-day exit path.
3. TWST — Squeeze Score 92.3
TWST shows 22.6% short interest, a 25.0% borrow fee, and 4.0 days to cover, with no threshold flag. Five-day momentum is sharply negative at minus 19.1%, which means shorts are currently winning, but the score stays high because the structural setup remains crowded. If a positive catalyst forces covering into a 22.6% short float, the unwind could be fast. Traders reviewing this kind of reversal setup in a journal can compare tooling on our TradeZella page.
4. HUT — Squeeze Score 91.2
HUT carries 16.2% short interest, a 25.0% borrow fee, and 3.2 days to cover, with a threshold flag and a five-day decline of 7.8%. The SI is the lowest in the top five, so this score is driven more by persistent short-volume pressure than by raw crowding. A squeeze here would likely need a catalyst that forces the threshold-level short flow to reverse rather than a borrow crunch alone.
5. CIFR — Squeeze Score 89.0
CIFR combines 21.2% short interest with a 41.8% borrow fee and the shortest days to cover in the top five at 2.1, with momentum down 12.7% over five days. The low days to cover means shorts could exit quickly if they choose, but the 41.8% fee makes holding expensive. If price stabilizes and borrow tightens, the fee burden becomes the catalyst.
Stocks Flagged on the FINRA Threshold List
The T column marks symbols on the FINRA threshold list, meaning more than 50% of recent consolidated volume was short-side over the last seven trading days. Nineteen of today's top 25 carry the flag, including every name in the top two and high-fee names like ASTS (88.6% borrow fee, 24.5% SI) and ABCL (83.3% borrow fee, 16.2% SI). Sustained short-side volume at that level signals the pressure is persistent rather than a single-session event. See /methodology/short-squeeze-score for the full breakdown.
How the Squeeze Score Is Built
The score weights five inputs: 35% short interest as a percent of float (FINRA), 25% borrow fee, 20% float utilization, 15% days to cover, and 5% five-day momentum. Underlying data is sourced from FINRA and SEC filings. The highest borrow fees on October 8, 2026 belong to ASTS at 88.6% and ABCL at 83.3%, while the deepest short squeeze crowding by SI% sits in RXRX and NTLA, both at 34.8%. Full methodology: /methodology/short-squeeze-score.
What Changed vs the Previous Record
RXRX drops out of the top 5 (was rank 3, score 95). SDGR drops out of the top 5 (was rank 5, score 93.2).
For real-time rankings visit the live leaderboard, and for prior dated records see the full daily archive.