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Contract OI history

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Dec 18, 2026 EXPIRATION

WK $55.00 Put

WK261218P00055000

Latest saved OI43Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WK $55.00 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. 43210 2026-10-02: 36 OI2026-10-05: 36 OI2026-10-06: 36 OI2026-10-07: 36 OI2026-10-08: 36 OI2026-10-09: 36 OI2026-10-13: 36 OI2026-10-14: 36 OI2026-10-15: 40 OI2026-10-20: 43 OI2026-10-23: 43 OI Oct 02, 2026Oct 23, 2026

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

WK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026430
Oct 20, 2026Viewing43+3
Oct 15, 202640+4
Oct 14, 2026360
Oct 13, 2026360
Oct 09, 2026360
Oct 08, 2026360
Oct 07, 2026360
Oct 06, 2026360
Oct 05, 2026360
Oct 02, 202636No prior observation