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Contract OI history

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Oct 23, 2026 EXPIRATION

ISRG $402.50 Put

ISRG261023P00402500

Latest saved OI205Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $402.50 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. 2051020 2026-10-09: 0 OI2026-10-13: 1 OI2026-10-14: 1 OI2026-10-15: 1 OI2026-10-16: 1 OI2026-10-21: 203 OI2026-10-23: 205 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, 2026Viewing205+2
Oct 21, 2026203+202
Oct 16, 202610
Oct 15, 202610
Oct 14, 202610
Oct 13, 20261+1
Oct 09, 20260No prior observation