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Contract OI history

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Jan 21, 2028 EXPIRATION

ERAS $20.00 Put

ERAS280121P00020000

Latest saved OI560Oct 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 $20.00 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. 5632810 2026-10-08: 563 OI2026-10-09: 563 OI2026-10-13: 563 OI2026-10-14: 563 OI2026-10-15: 560 OI2026-10-16: 560 OI2026-10-21: 560 OI2026-10-23: 560 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, 2026Viewing5600
Oct 21, 20265600
Oct 16, 20265600
Oct 15, 2026560-3
Oct 14, 20265630
Oct 13, 20265630
Oct 09, 20265630
Oct 08, 2026563No prior observation