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Contract OI history

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Jan 21, 2028 EXPIRATION

GM $77.50 Put

GM280121P00077500

Latest saved OI272Oct 23, 2026
Last change+127vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GM $77.50 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. 2721360 2026-10-02: 150 OI2026-10-05: 150 OI2026-10-06: 145 OI2026-10-07: 145 OI2026-10-08: 145 OI2026-10-09: 145 OI2026-10-13: 145 OI2026-10-14: 145 OI2026-10-15: 145 OI2026-10-16: 145 OI2026-10-21: 145 OI2026-10-23: 272 OI Oct 02, 2026Oct 23, 2026

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

GM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing272+127
Oct 21, 20261450
Oct 16, 20261450
Oct 15, 20261450
Oct 14, 20261450
Oct 13, 20261450
Oct 09, 20261450
Oct 08, 20261450
Oct 07, 20261450
Oct 06, 2026145-5
Oct 05, 20261500
Oct 02, 2026150No prior observation