The Chicago Board Options Exchange (CBOE) plans to modify the increment of Mini Bitcoin Index options quotes.

[Chicago Board Options Exchange Proposes Modifying Mini Bitcoin Index Options Quote Increment] According to Mars Finance, the U.S. Securities and Exchange Commission (SEC) has initiated a review process for the Chicago Board Options Exchange (Cboe)'s proposal to modify Rule 5.4, aiming to determine whether to approve adjustments to the minimum quote increment for Cboe Mini Bitcoin U.S. ETF Index (MBTX) options. The proposal plans to set the minimum quote unit at $0.01 for option series with a traded price below $3, and $0.05 for series with a traded price of $3 or higher. The SEC is currently seeking public comment on the proposal, with a deadline of January 21, 2026. Cboe states that MBTX is a mini index that tracks the performance of mainstream U.S. Bitcoin spot ETFs (such as IBIT). This move aims to align the quote granularity of MBTX options with that of BlackRock iShares Bitcoin Trust (IBIT) options, narrowing the bid-ask spread through finer pricing.