Source: https://mochatrade.com/learn/glossary/finra

# FINRA
URL: https://mochatrade.com/learn/glossary/finra
Last modified: 2026-10-17

FINRA is the Financial Industry Regulatory Authority, US brokers policing themselves under the SEC. It writes broker rules like the pattern day trader rule and publishes short interest twice a month. In the [referee column of the US market map](https://mochatrade.com/learn/us-market-structure/us-stock-market-explained) it is the name a headline uses when a broker is in trouble, and its data shows [who is short and squeezable](https://mochatrade.com/learn/us-market-structure/who-moves-us-stocks).

## Related terms

- SEC: https://mochatrade.com/learn/glossary/sec
- Short interest: https://mochatrade.com/learn/glossary/short-interest
- NASDAQ: https://mochatrade.com/learn/glossary/nasdaq
- CFTC: https://mochatrade.com/learn/glossary/cftc
- CME Group: https://mochatrade.com/learn/glossary/cme-group
- US ETF: https://mochatrade.com/learn/glossary/us-etf