How did KOP's Q4 2024 earnings surprise impact investor sentiment?

Koppers Holdings' (KOP) Q4 2024 earnings surprise had a mixed impact on investor sentiment, as evidenced by the fluctuations in the stock's performance during the period.

1. **Earnings Surprise**: The company reported an EPS surprise of -$0.14 for Q4 2024, which indicated that the actual earnings fell short of market expectations.

2. **Investor Sentiment**:
- Initially, there was a slight positive reaction, with the stock price increasing by 0.55% on October 1, 2024, and remaining relatively stable for a few days.
- However, sentiment took a negative turn, with the stock price decreasing by 2.67% on October 21, 2024, and further dropping by 3.46% on November 19, 2024.
- Subsequently, there were some minor fluctuations, with the stock price experiencing a slight increase on November 29, 2024, and a more significant rise on December 10, 2024.
- By the end of the quarter, on December 31, 2024, the stock price had increased by 1.41%, which could suggest that investors were starting to recover from the negative sentiment triggered by the earnings miss.

In conclusion, while the initial reaction to the earnings surprise was relatively neutral, the overall sentiment during Q4 2024 was largely negative due to the earnings miss. However, the subsequent recovery in the stock price towards the end of the quarter suggests that investors may have adjusted their expectations or that other factors were influencing the stock's performance.