Why is Thermax falling/rising?

As of 17-Sep, Thermax Ltd. is experiencing a decline in its stock price, currently at 3,306.00, which reflects a decrease of 13.2 or 0.4%. The stock has underperformed its sector by 0.9% today and has fallen after two consecutive days of gains. Its performance over the past week shows a decline of 1.78%, while it has gained 1.00% over the past month. However, the stock has significantly underperformed in the longer term, with a year-to-date return of -18.81% and a one-year return of -36.85%. The company has a low debt-to-equity ratio and healthy long-term growth in operating profit, but it also faces challenges such as flat results in recent quarters and an expensive valuation compared to its peers.
In the broader market context, the Sensex has increased by 1.56% over the past week and 2.60% over the past month, indicating that Thermax's recent decline is not reflective of the overall market trend. The stock's liquidity is adequate for trading, but there has been a notable drop in investor participation, with delivery volume falling by 50.76% against the five-day average. This decline in interest, coupled with the company's below-par performance in both the short and long term, suggests that investor sentiment may be negatively impacting the stock's price movement.