We use the event study method to examine the merger and acquisition announcement effects on the stock returns of the sample of 14 acquiring banks from India and the United States (US). The study concludes that although different markets react differently, such news does impact the stock price reaction by generating some abnormal returns around the announcement date. Since the cumulative average abnormal returns (CAARs) on most of the days in the event window period, as well as the post-event-window period, are significant for the shares of the Indian acquiring banks, the Indian market, an emerging market is more sensitive to such information as compared to the US market, a developed one.