How Often Is Short Float Data Updated?
Short float data plays a major role in market sentiment analysis, squeeze detection, and risk management. But many traders don’t realize that short float information isn’t always updated in real time. So, how often is short float updated, and where can you get the most accurate data?
The Standard Update Cycle
In the U.S., short interest data—which is used to calculate short float—is typically updated twice a month. These reports are published on a set schedule by FINRA and the major stock exchanges.
- Exchange Reporting Frequency: Bi-weekly
- Reporting Lag: ~2–4 business days after the reporting date
- Data Providers: NYSE, NASDAQ, FINRA
For example, if data is collected on the 15th, it may be published on the 18th or 19th.
Short Float Update Sources
Here are the typical update frequencies by platform:
| Source | Update Frequency | Notes |
|---|---|---|
| FINRA | Twice monthly | Official short interest reports |
| Yahoo Finance | Bi-weekly (delayed) | Reflects exchange updates |
| Finviz | Bi-weekly | Based on public data |
| Fintel | Daily estimates + exchange reports | Paid service with institutional data |
| Ortex | Real-time (estimated) | Uses proprietary algorithms and data feeds |
Estimated vs Official Short Float
- Official Reports: Accurate but delayed
- Estimated Float: Based on intraday short volume and borrowing rates
- Use Case: Real-time decisions benefit from estimates; long-term analysis should use official figures
Why Update Frequency Matters
- Trading Timing: Data delays can cause traders to miss squeeze setups or misread sentiment
- Backtesting: Outdated float data can skew technical or quantitative models
- News Impact: Short float estimates help traders react quickly to catalysts
How to Stay Current
- Bookmark the NYSE and NASDAQ short interest calendar
- Use Fintel or Ortex if you need intraday or daily estimate tracking
- Combine with volume and price movement to spot trends early
FAQs
Is short float updated daily?
No, official short float is updated twice monthly. However, platforms like Ortex and Fintel offer daily estimates.
Why does the short float seem outdated?
Because it’s based on short interest reports that have a built-in lag of a few days after collection.
Can I rely on Yahoo Finance for short float data?
Yes, but it’s delayed and reflects the last available exchange report.
What’s the most real-time short float data available?
Ortex and Fintel provide near real-time estimates using exchange feeds and proprietary models.
Does the update frequency vary by stock?
No. All U.S. stocks are reported under the same schedule. However, estimates may vary by data provider.