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Contract OI history

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Jan 15, 2027 EXPIRATION

CSTM $20.00 Call

CSTM270115C00020000

Latest saved OI1,058Oct 23, 2026
Last change0vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CSTM $20.00 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. 1,0595290 2026-10-02: 1,059 OI2026-10-05: 1,059 OI2026-10-06: 1,058 OI2026-10-07: 1,058 OI2026-10-08: 1,058 OI2026-10-13: 1,058 OI2026-10-14: 1,058 OI2026-10-16: 1,058 OI2026-10-20: 1,058 OI2026-10-23: 1,058 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, 2026Viewing1,0580
Oct 20, 20261,0580
Oct 16, 20261,0580
Oct 14, 20261,0580
Oct 13, 20261,0580
Oct 08, 20261,0580
Oct 07, 20261,0580
Oct 06, 20261,058-1
Oct 05, 20261,0590
Oct 02, 20261,059No prior observation