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Contract OI history

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Jan 21, 2028 EXPIRATION

STX $400.00 Put

STX280121P00400000

Latest saved OI762Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
STX $400.00 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. 7623810 2026-10-09: 752 OI2026-10-13: 741 OI2026-10-14: 741 OI2026-10-15: 743 OI2026-10-16: 759 OI2026-10-21: 760 OI2026-10-23: 762 OI Oct 09, 2026Oct 23, 2026

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

STX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing762+2
Oct 21, 2026760+1
Oct 16, 2026759+16
Oct 15, 2026743+2
Oct 14, 20267410
Oct 13, 2026741-11
Oct 09, 2026752No prior observation