Deep Fission, Inc. (FISN): Cost to Borrow & Stock Loan Fee
Latest borrow fee for FISN: 20.94% per year (as of Oct 7, 2026 11:37 AM ET) . Shortable shares available: 65,000.
Over the last window (Sep 7, 2026 – Oct 7, 2026) , borrow fees ranged from 12.46% to 21.11%, averaging 16.10% across 1,435 samples.
Frequently asked questions
What is the cost to borrow FISN?
The latest borrow fee for FISN is 20.94% per year, sourced from IBKR.
Why do borrow rates change?
Borrow fees rise when fewer shares are available to lend and fall when supply grows. Low-float, high short interest names often show sharp intraday fee spikes.
How often is CTB updated?
Borrow fees and shortable share counts are refreshed every few minutes during market hours.