BIO Open Interest
Bio-Rad Laboratories Inc.Class A (BIO) had 400 open option contracts as of Nov 4, 2026: 130 calls and 270 puts. Open interest fell 43.9% over the past four weeks. The put/call open interest ratio is 2.08, so puts outnumber calls.
Open Interest by Strike
Showing results for BIO, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for BIO, 2026-11-20(m), calls & puts
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| Put Open Interest Total | |
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Highest Open Interest Options
Showing results for BIO, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for BIO, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for BIO, all expirations, calls & puts. View full history
BIO Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does BIO have?
Bio-Rad Laboratories Inc.Class A had 400 open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 403 contracts.
Is BIO open interest rising or falling?
Open interest fell 43.9% over the past four weeks. It was 713 contracts on Oct 7, 2026. See the BIO open interest history for a longer view.
What is the BIO put/call open interest ratio?
The Bio-Rad Laboratories Inc.Class A put/call open interest ratio was 2.08 as of Nov 4, 2026. Four weeks earlier it was 0.09.
What is Bio-Rad Laboratories Inc.Class A?
Bio-Rad Laboratories, headquartered in Hercules, California, develops, manufactures, and sells products and solutions for the clinical diagnostics and life sciences markets.