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Contract OI history

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Jan 21, 2028 EXPIRATION

BFLY $5.50 Put

BFLY280121P00005500

Latest saved OI520Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BFLY $5.50 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. 5202600 2026-10-02: 495 OI2026-10-05: 495 OI2026-10-06: 495 OI2026-10-07: 495 OI2026-10-08: 495 OI2026-10-09: 513 OI2026-10-13: 513 OI2026-10-14: 516 OI2026-10-15: 516 OI2026-10-16: 520 OI2026-10-21: 520 OI2026-10-23: 520 OI Oct 02, 2026Oct 23, 2026

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

BFLY contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5200
Oct 21, 20265200
Oct 16, 2026520+4
Oct 15, 20265160
Oct 14, 2026516+3
Oct 13, 20265130
Oct 09, 2026513+18
Oct 08, 20264950
Oct 07, 20264950
Oct 06, 20264950
Oct 05, 20264950
Oct 02, 2026495No prior observation