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Contract OI history

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Jan 15, 2027 EXPIRATION

CSTM $20.00 Put

CSTM270115P00020000

Latest saved OI2,014Oct 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 put open interest history 10 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,0151,0070 2026-10-02: 2,015 OI2026-10-05: 2,015 OI2026-10-06: 2,015 OI2026-10-07: 2,015 OI2026-10-08: 2,015 OI2026-10-13: 2,014 OI2026-10-14: 2,014 OI2026-10-16: 2,014 OI2026-10-20: 2,014 OI2026-10-23: 2,014 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, 2026Viewing2,0140
Oct 20, 20262,0140
Oct 16, 20262,0140
Oct 14, 20262,0140
Oct 13, 20262,014-1
Oct 08, 20262,0150
Oct 07, 20262,0150
Oct 06, 20262,0150
Oct 05, 20262,0150
Oct 02, 20262,015No prior observation