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Contract OI history

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Dec 18, 2026 EXPIRATION

STM $55.00 Call

STM261218C00055000

Latest saved OI173Oct 23, 2026
Last change+26vs previous saved observation
Saved market days4Oct 15, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $55.00 call open interest history 4 saved observations from 2026-10-15 to 2026-10-23. Exact values and changes are listed in the table below. 173860 2026-10-15: 0 OI2026-10-16: 120 OI2026-10-21: 147 OI2026-10-23: 173 OI Oct 15, 2026Oct 23, 2026

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

STM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026173+26
Oct 21, 2026Viewing147+27
Oct 16, 2026120+120
Oct 15, 20260No prior observation