Rallybio Corporation (RLYB) — Cost to Borrow & Stock Loan Fee
Latest borrow fee for RLYB: 17.42% per year (as of May 21, 2026 12:33 PM ET) . Shortable shares available: 150,000.
Over the last window (Apr 21, 2026 – May 21, 2026) , borrow fees ranged from 1.18% to 63.79%, averaging 17.06% across 1,352 samples.
Frequently asked questions
- What is the cost to borrow RLYB?
- The latest borrow fee for RLYB is 17.42% per year, sourced from IBKR.
- Why does borrow fee change?
- Borrow fees rise when fewer shares are available to lend and fall when supply grows. Low-float, high-interest names often show sharp intraday fee spikes.
- How often is CTB updated?
- finshort polls IBKR throughout each trading session. Borrow fees and shortable share counts are refreshed every few minutes during market hours.