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Contract OI history

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Nov 20, 2026 EXPIRATION

ISRG $420.00 Put

ISRG261120P00420000

Latest saved OI328Oct 23, 2026
Last change+18vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $420.00 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. 3281640 2026-10-09: 106 OI2026-10-13: 242 OI2026-10-14: 242 OI2026-10-15: 241 OI2026-10-16: 240 OI2026-10-21: 310 OI2026-10-23: 328 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, 2026Viewing328+18
Oct 21, 2026310+70
Oct 16, 2026240-1
Oct 15, 2026241-1
Oct 14, 20262420
Oct 13, 2026242+136
Oct 09, 2026106No prior observation