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Contract OI history

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Dec 18, 2026 EXPIRATION

SSYS $7.50 Put

SSYS261218P00007500

Latest saved OI341Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
SSYS $7.50 put open interest history 7 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 3411700 2026-10-07: 341 OI2026-10-09: 336 OI2026-10-13: 336 OI2026-10-14: 336 OI2026-10-16: 336 OI2026-10-20: 340 OI2026-10-23: 341 OI Oct 07, 2026Oct 23, 2026

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

SSYS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing341+1
Oct 20, 2026340+4
Oct 16, 20263360
Oct 14, 20263360
Oct 13, 20263360
Oct 09, 2026336-5
Oct 07, 2026341No prior observation