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Contract OI history

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Dec 17, 2027 EXPIRATION

ERAS $17.50 Put

ERAS271217P00017500

Latest saved OI1,993Oct 23, 2026
Last change0vs previous saved observation
Saved market days8Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
ERAS $17.50 put open interest history 8 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 1,9939960 2026-10-08: 1,938 OI2026-10-09: 1,938 OI2026-10-13: 1,993 OI2026-10-14: 1,993 OI2026-10-15: 1,993 OI2026-10-16: 1,993 OI2026-10-21: 1,993 OI2026-10-23: 1,993 OI Oct 08, 2026Oct 23, 2026

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

ERAS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,9930
Oct 21, 20261,9930
Oct 16, 20261,9930
Oct 15, 20261,9930
Oct 14, 20261,9930
Oct 13, 20261,993+55
Oct 09, 20261,9380
Oct 08, 20261,938No prior observation