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Contract OI history

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Nov 20, 2026 EXPIRATION

BIRK $32.50 Put

BIRK261120P00032500

Latest saved OI232Oct 23, 2026
Last change+8vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BIRK $32.50 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. 2321160 2026-10-02: 107 OI2026-10-05: 107 OI2026-10-06: 107 OI2026-10-07: 127 OI2026-10-08: 127 OI2026-10-09: 131 OI2026-10-13: 137 OI2026-10-14: 137 OI2026-10-15: 140 OI2026-10-16: 201 OI2026-10-20: 224 OI2026-10-23: 232 OI Oct 02, 2026Oct 23, 2026

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

BIRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing232+8
Oct 20, 2026224+23
Oct 16, 2026201+61
Oct 15, 2026140+3
Oct 14, 20261370
Oct 13, 2026137+6
Oct 09, 2026131+4
Oct 08, 20261270
Oct 07, 2026127+20
Oct 06, 20261070
Oct 05, 20261070
Oct 02, 2026107No prior observation