CSCO Open Interest
Cisco Systems Inc (CSCO) had 848.55K open option contracts as of Nov 4, 2026: 450.46K calls and 398.09K puts. Open interest fell 5.6% over the past four weeks. The put/call open interest ratio is 0.88, so calls outnumber puts.
Open Interest by Strike
Showing results for CSCO, 2026-11-06(w), calls & puts
Open Interest Stats
Showing results for CSCO, 2026-11-06(w), calls & puts
| Call Open Interest Total | |
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for CSCO, 2026-11-06(w), calls & puts
Open Interest Total by Expiry
Showing results for CSCO, 2026-11-06(w), calls & puts. View all expiries
Open Interest History
Showing daily totals for CSCO, all expirations, calls & puts. View full history
CSCO 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 CSCO have?
Cisco Systems had 848.55K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 854.28K contracts.
Is CSCO open interest rising or falling?
Open interest fell 5.6% over the past four weeks. It was 898.87K contracts on Oct 7, 2026. See the CSCO open interest history for a longer view.
What is the CSCO put/call open interest ratio?
The Cisco Systems put/call open interest ratio was 0.88 as of Nov 4, 2026. Four weeks earlier it was 0.89.
What is Cisco Systems Inc?
Cisco Systems is the largest provider of networking equipment in the world and one of the largest software companies in the world.