The Reality of Daily Short Volume
FINRA's Reg SHO daily short sale volume files are a primary source for tracking daily short-selling pressure. However, it is crucial to distinguish this 'flow' data from 'open interest' (the total number of short positions held).
Data Limitations and Usage
Daily short volume represents the number of shares marked short on each trade that day. It includes market-maker hedging and is not a consolidated view of the entire market. To get a complete picture, analysts must combine data from TRFs, the ADF, and individual exchanges.
Key Takeaways
- Flow vs. Position: Daily short volume is flow, not open interest.
- Data Source: FINRA Reg SHO files.
- Usage: Use to gauge daily short-selling pressure, not the total size of short positions.
The Bottom Line
FINRA Reg SHO data is an essential tool for tracking daily short-selling activity, but it must be used correctly to avoid misinterpreting daily volume as a measure of total open short interest.
Signal data sourced from FINRA. This post is an original analysis prepared by The Forensic Ledger from publicly available data. Not investment advice.
Not investment advice. This is original reporting and analysis prepared by The Forensic Ledger from publicly available data. Nothing here is a recommendation to buy, sell, or hold any security. Always consult the original source and a licensed professional. See our full disclaimer and source-citation policy.