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Contract OI history

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Mar 19, 2027 EXPIRATION

BLSH $20.00 Put

BLSH270319P00020000

Latest saved OI278Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLSH $20.00 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. 2801400 2026-10-02: 280 OI2026-10-05: 280 OI2026-10-06: 280 OI2026-10-07: 280 OI2026-10-08: 268 OI2026-10-09: 268 OI2026-10-13: 278 OI2026-10-14: 278 OI2026-10-16: 278 OI2026-10-20: 278 OI2026-10-23: 278 OI Oct 02, 2026Oct 23, 2026

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

BLSH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2780
Oct 20, 20262780
Oct 16, 20262780
Oct 14, 20262780
Oct 13, 2026278+10
Oct 09, 20262680
Oct 08, 2026268-12
Oct 07, 20262800
Oct 06, 20262800
Oct 05, 20262800
Oct 02, 2026280No prior observation