OITracker Cboe delayed data

Contract OI history

Back to SLM

Nov 20, 2026 EXPIRATION

SLM $21.00 Put

SLM261120P00021000

Latest saved OI942Oct 23, 2026
Last change+466vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
SLM $21.00 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. 9424710 2026-10-09: 26 OI2026-10-13: 49 OI2026-10-14: 49 OI2026-10-15: 49 OI2026-10-16: 49 OI2026-10-21: 476 OI2026-10-23: 942 OI Oct 09, 2026Oct 23, 2026

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

SLM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026942+466
Oct 21, 2026Viewing476+427
Oct 16, 2026490
Oct 15, 2026490
Oct 14, 2026490
Oct 13, 202649+23
Oct 09, 202626No prior observation