OITracker Cboe delayed data

Contract OI history

Back to TOST

Oct 30, 2026 EXPIRATION

TOST $28.00 Put

TOST261030P00028000

Latest saved OI408Oct 23, 2026
Last change+57vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $28.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4082040 2026-10-02: 61 OI2026-10-05: 86 OI2026-10-06: 186 OI2026-10-07: 186 OI2026-10-08: 186 OI2026-10-09: 180 OI2026-10-13: 180 OI2026-10-14: 180 OI2026-10-15: 350 OI2026-10-16: 350 OI2026-10-21: 351 OI2026-10-23: 408 OI Oct 02, 2026Oct 23, 2026

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

TOST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026408+57
Oct 21, 2026Viewing351+1
Oct 16, 20263500
Oct 15, 2026350+170
Oct 14, 20261800
Oct 13, 20261800
Oct 09, 2026180-6
Oct 08, 20261860
Oct 07, 20261860
Oct 06, 2026186+100
Oct 05, 202686+25
Oct 02, 202661No prior observation