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Contract OI history

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May 21, 2027 EXPIRATION

WAB $270.00 Put

WAB270521P00270000

Latest saved OI240Oct 23, 2026
Last change+1vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WAB $270.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2401200 2026-10-02: 223 OI2026-10-05: 223 OI2026-10-06: 239 OI2026-10-07: 239 OI2026-10-08: 239 OI2026-10-09: 239 OI2026-10-14: 239 OI2026-10-15: 239 OI2026-10-16: 239 OI2026-10-21: 239 OI2026-10-23: 240 OI Oct 02, 2026Oct 23, 2026

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

WAB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026240+1
Oct 21, 2026Viewing2390
Oct 16, 20262390
Oct 15, 20262390
Oct 14, 20262390
Oct 09, 20262390
Oct 08, 20262390
Oct 07, 20262390
Oct 06, 2026239+16
Oct 05, 20262230
Oct 02, 2026223No prior observation