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Contract OI history

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Nov 20, 2026 EXPIRATION

CSTM $27.00 Call

CSTM261120C00027000

Latest saved OI681Oct 23, 2026
Last change+36vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CSTM $27.00 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. 6813400 2026-10-02: 216 OI2026-10-05: 249 OI2026-10-06: 249 OI2026-10-07: 265 OI2026-10-08: 265 OI2026-10-13: 319 OI2026-10-14: 332 OI2026-10-16: 341 OI2026-10-20: 645 OI2026-10-23: 681 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, 2026Viewing681+36
Oct 20, 2026645+304
Oct 16, 2026341+9
Oct 14, 2026332+13
Oct 13, 2026319+54
Oct 08, 20262650
Oct 07, 2026265+16
Oct 06, 20262490
Oct 05, 2026249+33
Oct 02, 2026216No prior observation