Comerica’s Mega Merger Shock: Why CMA Stock Skyrocketed as Fifth Third’s $10.9 Billion Deal Reshaped Regional Banking
Current Stock Performance & Market Reaction The announcement of Fifth Third Bancorp’s planned acquisition of Comerica sent CMA stock soaring. On 6 October 2025, Comerica’s investor‑relations website showed the stock opening near $81.00 and trading around $79.62–$80.56, up 9–14 % from the previous close investor.comerica.com. MarketWatch reported that CMA shares rallied 15.1 % to $81.20, a three‑year high, while Fifth Third’s shares dipped 0.3 % morningstar.com. The initial spike reflected the generous 20 % premium offered by Fifth Third and expectations that the combined bank would command more market share. Investors also reacted to a brighter regulatory outlook. Reuters noted that U.S. regulators have streamlined bank‑merger