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Contract OI history

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Nov 20, 2026 EXPIRATION

FER $55.00 Put

FER261120P00055000

Latest saved OI11Oct 20, 2026
Last change+1vs previous saved observation
Saved market days6Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
FER $55.00 put open interest history 6 saved observations from 2026-10-08 to 2026-10-20. Exact values and changes are listed in the table below. 1150 2026-10-08: 7 OI2026-10-09: 8 OI2026-10-13: 10 OI2026-10-14: 10 OI2026-10-16: 10 OI2026-10-20: 11 OI Oct 08, 2026Oct 20, 2026

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

FER contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing11+1
Oct 16, 2026100
Oct 14, 2026100
Oct 13, 202610+2
Oct 09, 20268+1
Oct 08, 20267No prior observation