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Contract OI history

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Nov 20, 2026 EXPIRATION

CSTM $25.00 Put

CSTM261120P00025000

Latest saved OI557Oct 23, 2026
Last change+2vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CSTM $25.00 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. 5572780 2026-10-02: 510 OI2026-10-05: 510 OI2026-10-06: 516 OI2026-10-07: 516 OI2026-10-08: 516 OI2026-10-13: 511 OI2026-10-14: 519 OI2026-10-16: 539 OI2026-10-20: 555 OI2026-10-23: 557 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, 2026Viewing557+2
Oct 20, 2026555+16
Oct 16, 2026539+20
Oct 14, 2026519+8
Oct 13, 2026511-5
Oct 08, 20265160
Oct 07, 20265160
Oct 06, 2026516+6
Oct 05, 20265100
Oct 02, 2026510No prior observation