OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

S $21.00 Put

S270115P00021000

Latest saved OI416Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
S $21.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4162080 2026-10-02: 192 OI2026-10-05: 178 OI2026-10-06: 178 OI2026-10-07: 179 OI2026-10-08: 179 OI2026-10-09: 388 OI2026-10-13: 390 OI2026-10-14: 390 OI2026-10-15: 390 OI2026-10-16: 392 OI2026-10-21: 416 OI2026-10-23: 416 OI Oct 02, 2026Oct 23, 2026

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

S contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4160
Oct 21, 2026416+24
Oct 16, 2026392+2
Oct 15, 20263900
Oct 14, 20263900
Oct 13, 2026390+2
Oct 09, 2026388+209
Oct 08, 20261790
Oct 07, 2026179+1
Oct 06, 20261780
Oct 05, 2026178-14
Oct 02, 2026192No prior observation