About Deep Fission, Inc. (FISN) data
Data as of August 14, 2026.
Deep Fission, Inc. (FISN) has 876.28K shares sold short as of the latest FINRA settlement report on August 14, 2026. Short interest has increased by 110.98% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 3.50 days (days to cover).
Recent FISN short interest history
| Settlement date | Short interest | Change | Days to cover |
|---|---|---|---|
| Aug 14, 2026 | 876,278 | 110.98% | 3.50 |
| Jul 31, 2026 | 415,329 | -23.02% | 3.01 |
| Jul 15, 2026 | 539,496 | -34.47% | 2.57 |
| Jun 30, 2026 | 823,230 | 100.00% | 1.00 |
Full history, charts, and borrow-fee detail are on the FISN short interest page.
Frequently asked questions
What is the current short interest in FISN?
As of the latest FINRA settlement dated August 14, 2026, FISN had approximately 876,278 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short FISN?
The latest borrow fee (cost to borrow) for FISN is 15.92% 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 FISN?
Days to cover for FISN is approximately 3.50 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 FISN a short squeeze candidate?
A squeeze needs shorts that are hard to close. FISN trades about 250,265 shares a day and would take roughly 3.50 days to unwind current short positions, at a current borrow fee of 15.92%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.