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Contract OI history

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Oct 23, 2026 EXPIRATION

ISRG $400.00 Put

ISRG261023P00400000

Latest saved OI789Oct 23, 2026
Last change-27vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $400.00 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. 8164080 2026-10-09: 56 OI2026-10-13: 96 OI2026-10-14: 96 OI2026-10-15: 96 OI2026-10-16: 109 OI2026-10-21: 816 OI2026-10-23: 789 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, 2026Viewing789-27
Oct 21, 2026816+707
Oct 16, 2026109+13
Oct 15, 2026960
Oct 14, 2026960
Oct 13, 202696+40
Oct 09, 202656No prior observation