Protagenic Therapeutics, Inc. (PTIX): Cost to Borrow & Stock Loan Fee
Latest borrow fee for PTIX: 23.73% per year (as of Oct 20, 2026 12:58 AM ET) . Shortable shares available: 30,000.
Over the last window (Sep 21, 2026 – Oct 20, 2026) , borrow fees ranged from 23.24% to 28.99%, averaging 24.23% across 1,386 samples.
Frequently asked questions
What is the cost to borrow PTIX?
The latest borrow fee for PTIX is 23.73% per year.
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.