OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

SAR $17.50 Put

SAR270521P00017500

Latest saved OI7Oct 23, 2026
Last change0vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SAR $17.50 put open interest history 10 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 840 2026-10-02: 5 OI2026-10-05: 5 OI2026-10-07: 5 OI2026-10-08: 8 OI2026-10-09: 8 OI2026-10-13: 8 OI2026-10-14: 8 OI2026-10-16: 7 OI2026-10-20: 7 OI2026-10-23: 7 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

SAR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing70
Oct 20, 202670
Oct 16, 20267-1
Oct 14, 202680
Oct 13, 202680
Oct 09, 202680
Oct 08, 20268+3
Oct 07, 202650
Oct 05, 202650
Oct 02, 20265No prior observation