OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

S $21.00 Put

S270319P00021000

Latest saved OI45Oct 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. 45220 2026-10-02: 33 OI2026-10-05: 33 OI2026-10-06: 35 OI2026-10-07: 35 OI2026-10-08: 35 OI2026-10-09: 41 OI2026-10-13: 41 OI2026-10-14: 41 OI2026-10-15: 43 OI2026-10-16: 43 OI2026-10-21: 45 OI2026-10-23: 45 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, 2026Viewing450
Oct 21, 202645+2
Oct 16, 2026430
Oct 15, 202643+2
Oct 14, 2026410
Oct 13, 2026410
Oct 09, 202641+6
Oct 08, 2026350
Oct 07, 2026350
Oct 06, 202635+2
Oct 05, 2026330
Oct 02, 202633No prior observation