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Contract OI history

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Dec 18, 2026 EXPIRATION

ISRG $340.00 Put

ISRG261218P00340000

Latest saved OI604Oct 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 $340.00 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. 6253120 2026-10-09: 625 OI2026-10-13: 622 OI2026-10-14: 622 OI2026-10-15: 619 OI2026-10-16: 620 OI2026-10-21: 605 OI2026-10-23: 604 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, 2026Viewing604-1
Oct 21, 2026605-15
Oct 16, 2026620+1
Oct 15, 2026619-3
Oct 14, 20266220
Oct 13, 2026622-3
Oct 09, 2026625No prior observation