Why is Sundaram Finance falling/rising?

As of 11-Aug, Sundaram Finance Ltd is experiencing a slight increase in its stock price, currently at 4,516.50, with a change of 9.1 (0.2%) upward. However, today's performance indicates a challenging environment, as the stock opened with a loss of 2.1% and has underperformed its sector by 0.49%. The stock has shown mixed returns over the past week, gaining 1.27%, while it has declined by 9.64% over the past month. Despite a strong long-term fundamental strength with an average Return on Equity (ROE) of 13.90% and high institutional holdings at 26.63%, the stock's valuation appears expensive with a Price to Book Value of 3.8, which may be contributing to investor caution.
In the broader market context, Sundaram Finance's recent performance contrasts with the Sensex, which has declined by 0.51% over the past week. The stock's liquidity remains adequate for trading, but a significant drop in delivery volume by 67.05% against the 5-day average suggests a decrease in investor participation. While the stock has consistently outperformed the BSE500 over the last three years, the flat results reported in June and the lowest operating cash flow of Rs -8,985.25 Cr may have raised concerns among investors, leading to a cautious outlook despite its historical performance.