OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

SSYS $12.50 Call

SSYS270115C00012500

Latest saved OI1,359Oct 23, 2026
Last change-4vs previous saved observation
Saved market days7Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
SSYS $12.50 call open interest history 7 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 1,3886940 2026-10-07: 1,388 OI2026-10-09: 1,388 OI2026-10-13: 1,374 OI2026-10-14: 1,374 OI2026-10-16: 1,363 OI2026-10-20: 1,363 OI2026-10-23: 1,359 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, 2026Viewing1,359-4
Oct 20, 20261,3630
Oct 16, 20261,363-11
Oct 14, 20261,3740
Oct 13, 20261,374-14
Oct 09, 20261,3880
Oct 07, 20261,388No prior observation