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Contract OI history

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Dec 18, 2026 EXPIRATION

MAT $18.00 Put

MAT261218P00018000

Latest saved OI2,195Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MAT $18.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2,1951,0970 2026-10-09: 0 OI2026-10-13: 2,084 OI2026-10-14: 2,084 OI2026-10-15: 2,130 OI2026-10-16: 2,130 OI2026-10-21: 2,195 OI2026-10-23: 2,195 OI Oct 09, 2026Oct 23, 2026

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

MAT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262,1950
Oct 21, 2026Viewing2,195+65
Oct 16, 20262,1300
Oct 15, 20262,130+46
Oct 14, 20262,0840
Oct 13, 20262,084+2,084
Oct 09, 20260No prior observation