About IO Biotech, Inc. (IOBT) data
Data as of March 31, 2026.
IO Biotech, Inc. (IOBT) has 2.15M shares sold short as of the latest FINRA settlement report on March 31, 2026. Short interest has decreased by 23.68% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 0.31 days (days to cover).
Recent IOBT short interest history
| Settlement date | Short interest | Change | Days to cover |
|---|---|---|---|
| Mar 31, 2026 | 2,152,443 | -23.68% | 1.00 |
| Mar 13, 2026 | 2,820,245 | -11.53% | 1.42 |
| Feb 27, 2026 | 3,187,932 | -25.22% | 5.04 |
| Feb 13, 2026 | 4,262,939 | -20.92% | 1.57 |
| Jan 30, 2026 | 5,390,908 | 74.81% | 1.00 |
| Jan 15, 2026 | 3,083,794 | 47.25% | 4.20 |
| Dec 31, 2025 | 2,094,316 | 3.89% | 3.35 |
| Dec 15, 2025 | 2,015,986 | -29.17% | 2.16 |
| Nov 28, 2025 | 2,846,392 | 17.28% | 3.46 |
| Nov 14, 2025 | 2,426,960 | -12.15% | 2.87 |
| Oct 31, 2025 | 2,762,590 | 142.58% | 1.00 |
| Oct 15, 2025 | 1,138,820 | -51.13% | 1.00 |
Full history, charts, and borrow-fee detail are on the IOBT short interest page.
Frequently asked questions
What is the current short interest in IOBT?
As of the latest FINRA settlement dated March 31, 2026, IOBT had approximately 2,152,443 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short IOBT?
The latest borrow fee (cost to borrow) for IOBT is 6.60% per year, based on IBKR data. Fees can change throughout the trading day as shares are borrowed and returned.
What is the days to cover ratio for IOBT?
Days to cover for IOBT is approximately 0.31 days. This estimates how many trading days it would take short sellers to buy back all outstanding short shares at the current average daily volume.
Is IOBT a short squeeze candidate?
A squeeze needs shorts that are hard to close. IOBT trades about 7,052,207 shares a day and would take roughly 0.31 days to unwind current short positions, at a current borrow fee of 6.60%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.