How often is cost-to-borrow data updated?

Cost-to-borrow fee rates, rebate rates, and shortable share counts come from Interactive Brokers and are refreshed throughout each trading session, covering roughly 17,000 US-listed stocks. Borrow rates can vary between brokers.

Where does finshort insider trading data come from?

Insider transactions come from SEC EDGAR Form 4 filings, which insiders must file typically within two business days of a transaction. Institutional ownership comes from quarterly SEC Form 13F-HR filings plus SC 13D and 13G beneficial ownership filings, and executive compensation comes from DEF 14A proxy statements.

What is Reg SHO daily short volume?

Regulation SHO requires reporting facilities to publish daily short sale volume. FINRA publishes this data after each trading day, and finshort aggregates volumes per symbol to compute the daily short volume ratio and its 7-day and 30-day averages.

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Data Sources

Q: Where does finshort short interest data come from?

Consolidated short interest comes from FINRA, reported by broker-dealers and published twice monthly on settlement dates (mid-month and month-end, business-day adjusted). It covers all US-listed stocks on NYSE and NASDAQ.

Every dataset on finshort, where it comes from, and how often it updates. See our methodology for how scores are computed from this data.

FINRA — Consolidated Short Interest

Official short interest reported by broker-dealers to FINRA. Published twice monthly on settlement dates (mid-month and month-end, business-day adjusted), typically several business days after settlement.

Coverage: all US-listed stocks (NYSE and NASDAQ), 40,000+ symbols
Fields: shares sold short, change from the prior report, average daily volume, days to cover
Powers: short interest levels and history, short % of float, days to cover, short interest change

FINRA — Reg SHO Daily Short Sale Volume

Daily short sale volume required by Regulation SHO, published by FINRA after each trading day. Volumes from all reporting facilities are aggregated per symbol.

Powers: daily short volume, short volume ratio, and 7-day / 30-day short volume averages

Interactive Brokers — Cost to Borrow & Shortable Shares

Borrow fee rates (CTB), rebate rates, and shortable share counts from Interactive Brokers, refreshed throughout each trading session.

Coverage: ~17,000 US-listed stocks
Powers: current and historical cost to borrow, borrow rate momentum and persistence scores, shortable share availability

Note: CTB is an annualized rate and can vary between brokers. A 100% CTB means shorting $10,000 of stock costs roughly $27 per day in borrow fees.

SEC EDGAR — Insider & Institutional Filings

All insider and institutional data comes directly from SEC EDGAR filings:

Form 4 — insider transactions (buys, sells, option exercises), typically filed within two business days of the trade. Powers the insider trading dashboard, per-ticker insider pages, and insider profiles.
Form 13F-HR — quarterly institutional holdings, filed up to 45 days after each quarter ends. Powers institutional ownership pages and institution profiles.
SC 13D / 13G — beneficial ownership filings for stakes above 5%.
DEF 14A — proxy statements. Powers executive compensation pages.

Market & Company Data

Prices, float, shares outstanding, and company profiles are enriched from public market data providers on a daily cadence. Social sentiment and ticker mention counts are sourced from StockTwits.

Update Cadence Summary

Cost to borrow: multiple times per trading day
Short volume (Reg SHO): daily, after market close
Insider Form 4 filings: continuously as filed (typically within 2 business days of a transaction)
Short interest: twice monthly (FINRA settlement schedule)
Institutional 13F holdings: quarterly (up to 45 days after quarter end)

Accuracy

We aggregate data from official and public sources but cannot guarantee accuracy or timeliness — reporting lags are inherent to FINRA and SEC publication schedules. Always verify with official sources before making decisions. See our disclaimer.