How did GPC's Q4 earnings surprise impact investor sentiment?

GPC's Q4 earnings surprise had a generally positive impact on investor sentiment, as evidenced by the backtest results. The 3-Day win rate was 50%, the 10-Day win rate was 68.75%, and the 30-Day win rate was 62.50%, indicating that the majority of the time, the stock performed well in the short term following the earnings release. The maximum return observed was 4.54% over 30 days, suggesting that there was potential for gains in the aftermath of the earnings beat expectations.