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Contract OI history

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Nov 20, 2026 EXPIRATION

CSTM $26.00 Call

CSTM261120C00026000

Latest saved OI1,224Oct 23, 2026
Last change+35vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CSTM $26.00 call open interest history 10 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,2246120 2026-10-02: 124 OI2026-10-05: 124 OI2026-10-06: 126 OI2026-10-07: 127 OI2026-10-08: 127 OI2026-10-13: 128 OI2026-10-14: 129 OI2026-10-16: 1,116 OI2026-10-20: 1,189 OI2026-10-23: 1,224 OI Oct 02, 2026Oct 23, 2026

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

CSTM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,224+35
Oct 20, 20261,189+73
Oct 16, 20261,116+987
Oct 14, 2026129+1
Oct 13, 2026128+1
Oct 08, 20261270
Oct 07, 2026127+1
Oct 06, 2026126+2
Oct 05, 20261240
Oct 02, 2026124No prior observation