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Contract OI history

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Mar 19, 2027 EXPIRATION

CSCO $55.00 Put

CSCO270319P00055000

Latest saved OI7,897Oct 23, 2026
Last change-47vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CSCO $55.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 10,7805,3900 2026-10-09: 10,780 OI2026-10-13: 7,882 OI2026-10-14: 7,882 OI2026-10-15: 7,882 OI2026-10-16: 7,882 OI2026-10-21: 7,944 OI2026-10-23: 7,897 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CSCO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing7,897-47
Oct 21, 20267,944+62
Oct 16, 20267,8820
Oct 15, 20267,8820
Oct 14, 20267,8820
Oct 13, 20267,882-2,898
Oct 09, 202610,780No prior observation