According to Foresight News , the U.S. Securities and Exchange Commission (SEC) has initiated a review process for a proposal submitted by the Chicago Board Options Exchange (Cboe) to amend Rule 5.4, in order to determine whether to approve adjustments to the minimum quote increment for Cboe Mini Bitcoin U.S. ETF Index (MBTX) options. The proposal suggests setting the minimum quote unit at $0.01 for option series with a traded price below $3 and at $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 stated that MBTX is a mini index that tracks the performance of mainstream Bitcoin spot ETFs in the US market, such as IBIT. This move aims to align the pricing granularity of MBTX options with that of BlackRock iShares Bitcoin Trust (IBIT) options, thereby narrowing the bid-ask spread through finer pricing.
