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The backtest results indicate that BAC shows a modest short-term positive reaction to earnings beats, with a 38.46% win rate over 3 days and a slight average return of 0.62%. However, over 10 and 30 days, the win rates improve but returns remain minimal or negative, suggesting limited sustained impact. In contrast, the Banks Industry overall experiences a slight negative effect with only a 0.70% maximum return 27 days post-event, indicating weak sector-wide gains from earnings beats. This implies investors should be cautious about relying solely on earnings beats for significant gains in BAC or the banking sector.