Why is Sundaram Fin.Hol falling/rising?

As of 18-Sep, Sundaram Finance Holdings Ltd is experiencing a decline in its stock price, currently at 587.35, which reflects a decrease of 44.35 points or 7.02%. Today's price summary indicates that the stock has underperformed its sector by 7.35%. Despite this drop, the stock has shown strong performance over longer periods, with a 22.85% increase over the past month and an impressive 96.21% rise year-to-date. However, there is a notable decline in investor participation, as the delivery volume has fallen by 54.35% compared to the 5-day average. The stock remains liquid enough for trading, with a healthy long-term fundamental strength evidenced by a 26.89% CAGR growth in operating profits and a debt-equity ratio of 0.00 times.
In the broader market context, the stock's recent performance contrasts with the benchmark Sensex, which has increased by 1.67% over the past week. While Sundaram Finance Holdings Ltd has outperformed the Sensex over longer periods, its recent underperformance today suggests a potential shift in investor sentiment or market conditions. The stock's strong historical returns, including a 51.81% gain over the last year, indicate robust fundamentals, but the current decline may reflect short-term volatility or profit-taking among investors.