城堡证券收购摩根士丹利的期权做市业务。

Group 1 - Castle Securities has acquired Morgan Stanley's options market-making business, indicating a strategic move to enhance its trading capabilities [1] - The acquisition is expected to strengthen Castle Securities' position in the financial markets and expand its operational footprint [1] - This transaction reflects ongoing consolidation trends within the financial services industry, particularly in trading and market-making sectors [1]