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Contract OI history

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Nov 20, 2026 EXPIRATION

ISRG $435.00 Put

ISRG261120P00435000

Latest saved OI135Oct 23, 2026
Last change+70vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $435.00 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. 135670 2026-10-09: 5 OI2026-10-13: 5 OI2026-10-14: 5 OI2026-10-15: 5 OI2026-10-16: 5 OI2026-10-21: 65 OI2026-10-23: 135 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, 2026Viewing135+70
Oct 21, 202665+60
Oct 16, 202650
Oct 15, 202650
Oct 14, 202650
Oct 13, 202650
Oct 09, 20265No prior observation