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Contract OI history

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Dec 18, 2026 EXPIRATION

FSK $17.50 Put

FSK261218P00017500

Latest saved OI617Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 01, 2026 onwards
Daily open interest Hover a point for its date and OI
FSK $17.50 put open interest history 11 saved observations from 2026-10-01 to 2026-10-23. Exact values and changes are listed in the table below. 2,1681,0840 2026-10-01: 2,168 OI2026-10-05: 631 OI2026-10-06: 631 OI2026-10-07: 631 OI2026-10-08: 631 OI2026-10-09: 627 OI2026-10-13: 627 OI2026-10-14: 627 OI2026-10-16: 617 OI2026-10-21: 617 OI2026-10-23: 617 OI Oct 01, 2026Oct 23, 2026

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

FSK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing6170
Oct 21, 20266170
Oct 16, 2026617-10
Oct 14, 20266270
Oct 13, 20266270
Oct 09, 2026627-4
Oct 08, 20266310
Oct 07, 20266310
Oct 06, 20266310
Oct 05, 2026631-1,537
Oct 01, 20262,168No prior observation