Market data & analytics for 40,000+ US-listed stocks
Finshort gives you the latest & most accurate data for short interest, insider trading activity, short volume, cost-to-borrow rates, and more for over 40,000 stocks. This dashboard has a live feed with the top shorted stocks at the moment, the top borrow rate movers, and the latest insider trading activity.
More about this page
Every ticker page combines short interest history, borrow fee trends, days to cover, insider transactions from SEC Form 4 filings, and institutional ownership from 13F filings — plus proprietary scores that summarize squeeze potential. See our methodology and data sources for how everything is computed.
Frequently asked questions
What is short interest?
Short interest is the total number of shares that have been sold short and not yet covered. It is reported by broker-dealers to FINRA and published twice monthly. Comparing short interest to a stock's float (short % of float) shows how heavily a stock is being bet against.
What is cost to borrow (CTB)?
Cost to borrow is the annualized fee short sellers pay to borrow shares. High or rising borrow fees indicate scarce share supply and strong shorting demand — a key ingredient in short squeezes. finshort refreshes CTB data from Interactive Brokers throughout each trading session.
How often is finshort data updated?
Cost to borrow updates multiple times per trading day, short volume updates daily after market close, insider Form 4 filings appear as they are filed with the SEC, short interest updates twice monthly on FINRA's settlement schedule, and institutional 13F holdings update quarterly.
Is finshort free?
Yes — screener, ticker pages, insider data, institutional ownership, and historical charts are free. A premium subscription adds real-time email alerts for short squeeze setups, CTB spikes, and insider cluster buys.