Why is Cummins India falling/rising?

As of 21-Jul, Cummins India Ltd. is experiencing a price increase, currently at 3,608.50, reflecting a rise of 81.0 points or 2.3%. The stock has shown strong performance today, outperforming its sector by 0.48%, and reached an intraday high of Rs 3,630, marking a 2.91% increase. Over the past week, the stock has risen by 2.08%, and over the last month, it has gained 10.17%, indicating robust momentum. The company benefits from strong long-term fundamentals, evidenced by an average Return on Equity (ROE) of 20.76% and significant operating profit growth at an annual rate of 32.24%. However, it faces challenges with a high valuation, as indicated by a Price to Book Value of 13.2, which suggests it is trading at a premium compared to its peers.
In the broader market context, Cummins India has significantly outperformed the benchmark Sensex, which has seen a slight decline of 0.06% over the past week. While the stock has shown resilience with a year-to-date increase of 10.02% compared to the Sensex's 5.20%, the recent drop in investor participation, with delivery volume falling by 37.89% against the 5-day average, raises concerns about liquidity. Despite these risks, the high institutional ownership at 40.15% indicates confidence from more knowledgeable investors, which may support the stock's upward trajectory in the near term.