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Contract OI history

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Nov 20, 2026 EXPIRATION

HRB $40.00 Put

HRB261120P00040000

Latest saved OI5,381Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
HRB $40.00 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. 5,3812,6900 2026-10-02: 271 OI2026-10-05: 271 OI2026-10-06: 272 OI2026-10-07: 274 OI2026-10-08: 273 OI2026-10-09: 273 OI2026-10-13: 5,369 OI2026-10-14: 5,370 OI2026-10-15: 5,373 OI2026-10-16: 5,376 OI2026-10-21: 5,381 OI2026-10-23: 5,381 OI Oct 02, 2026Oct 23, 2026

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

HRB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5,3810
Oct 21, 20265,381+5
Oct 16, 20265,376+3
Oct 15, 20265,373+3
Oct 14, 20265,370+1
Oct 13, 20265,369+5,096
Oct 09, 20262730
Oct 08, 2026273-1
Oct 07, 2026274+2
Oct 06, 2026272+1
Oct 05, 20262710
Oct 02, 2026271No prior observation