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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $310.00 Put

ISRG261218P00310000

Latest saved OI415Oct 23, 2026
Last change-1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $310.00 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. 4182090 2026-10-09: 418 OI2026-10-13: 417 OI2026-10-14: 417 OI2026-10-15: 417 OI2026-10-16: 417 OI2026-10-21: 416 OI2026-10-23: 415 OI Oct 09, 2026Oct 23, 2026

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

ISRG contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing415-1
Oct 21, 2026416-1
Oct 16, 20264170
Oct 15, 20264170
Oct 14, 20264170
Oct 13, 2026417-1
Oct 09, 2026418No prior observation