Why is KRN Heat Exchan falling/rising?

As of 31-Jul, KRN Heat Exchanger and Refrigeration Ltd's stock price is currently at 855.00, reflecting a decrease of 4.0 points or 0.47%. Today, the stock underperformed its sector by 0.88%, with an intraday high of Rs 877.45 and a low of Rs 840. Over the past week, the stock has shown a slight gain of 0.59%, while it has remained relatively flat over the past month with a change of -0.06%. The company has demonstrated strong fundamentals, including a high return on equity (ROE) of 20.30% and a low debt to EBITDA ratio of 0.37 times, indicating good management efficiency and the ability to service debt. However, the stock is considered expensive with a price to book value of 10.7, which may be contributing to the recent downward pressure on its price.
In the broader market context, KRN Heat Exchanger's short-term performance has outpaced the benchmark Sensex, which has declined by 1.22% over the past week and 3.00% over the past month. Despite the stock's recent price drop, it has shown a year-to-date increase of 21.91%, significantly outperforming the Sensex's 3.90% gain. Additionally, there has been increasing participation from institutional investors, who have raised their stake by 0.92% in the last quarter, indicating confidence in the company's long-term growth potential. However, the stock's recent performance may be tempered by its high valuation and the overall market sentiment, which could be affecting investor confidence.