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Contract OI history

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Nov 20, 2026 EXPIRATION

CSTM $28.00 Call

CSTM261120C00028000

Latest saved OI593Oct 23, 2026
Last change+72vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CSTM $28.00 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. 5932960 2026-10-02: 444 OI2026-10-05: 455 OI2026-10-06: 455 OI2026-10-07: 455 OI2026-10-08: 455 OI2026-10-13: 459 OI2026-10-14: 478 OI2026-10-16: 479 OI2026-10-20: 521 OI2026-10-23: 593 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, 2026Viewing593+72
Oct 20, 2026521+42
Oct 16, 2026479+1
Oct 14, 2026478+19
Oct 13, 2026459+4
Oct 08, 20264550
Oct 07, 20264550
Oct 06, 20264550
Oct 05, 2026455+11
Oct 02, 2026444No prior observation