Self-Regulatory Organizations; Miami International Securities Exchange, LLC; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Exchange Rule 307, Position Limits, and Exchange Rule 309, Exercise Limits, To Increase the Position and Exercise Limits for iShares Bitcoin Trust ETF

se the position limits and exercise limits for options on IBIT to 1,000,000 contracts by noting the proposed position limit in Interpretation and Policy .01 to Exchange Rule 307, Position Limits, and Interpretation and Policy .01 to Exchange Rule 309, Exercise Limits. The position limit for options on IBIT is currently set pursuant to Exchange Rule 307(d) where the largest in capitalization and the most frequently traded stocks and ETFs have an option position limit of 250,000 contracts (with adjustments for splits, re-capitalizations, etc.) on the same side of the market; and smaller capitalization stocks and ETFs have position limits of 200,000, 75,000, 50,000 or 25,000 contracts (with adjustments for splits, recapitalizations, etc.) on the same side of the market. The Exchange notes that the proposed position limits and exercise limits for options on IBIT are consistent with existing position limits and exercise limits for options on iShares MSCI Emerging Markets, iShares China Large-Cap ETF and iShares MSCI EAFE ETF. Composition and Growth Analysis for Underlying ETFs As stated above, position (and exercise) limits are intended to prevent the establishment of options positions that can be used or might create incentives to manipulate the underlying market so as to benefit options positions. The Commission has recognized that these limits are designed to minimize the potenti