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Contract OI history

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Dec 18, 2026 EXPIRATION

CLS $320.00 Put

CLS261218P00320000

Latest saved OI395Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CLS $320.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3951970 2026-10-02: 348 OI2026-10-05: 350 OI2026-10-06: 350 OI2026-10-07: 353 OI2026-10-08: 376 OI2026-10-09: 376 OI2026-10-13: 377 OI2026-10-14: 377 OI2026-10-15: 383 OI2026-10-16: 390 OI2026-10-21: 394 OI2026-10-23: 395 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CLS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing395+1
Oct 21, 2026394+4
Oct 16, 2026390+7
Oct 15, 2026383+6
Oct 14, 20263770
Oct 13, 2026377+1
Oct 09, 20263760
Oct 08, 2026376+23
Oct 07, 2026353+3
Oct 06, 20263500
Oct 05, 2026350+2
Oct 02, 2026348No prior observation