Why is Chemtech Indust. falling/rising?

As of 17-Sep, Chemtech Industrial Valves Ltd is experiencing a price increase, currently at 125.75, reflecting a rise of 1.75 or 1.41%. The stock has shown strong performance recently, gaining 22.68% over the last four days and outperforming its sector by 0.63% today. It reached an intraday high of Rs 127, although it also saw a low of Rs 121. The stock's recent returns are impressive, with a 21.97% increase over the past week and a 16.44% increase over the past month. Positive financial results reported on June 25, including the highest quarterly PBDIT and operating profit margins, have likely contributed to this upward movement. However, the stock's long-term fundamentals are weak, with a low return on equity of 9.90% and a significant decline of 55.87% over the past year, indicating potential concerns for investors.
In the broader market context, Chemtech's short-term performance significantly outpaces the Sensex, which has only increased by 1.56% over the past week. Despite this strong short-term return, the stock has underperformed the benchmark over longer periods, including a 41.59% decline year-to-date compared to the Sensex's 5.83% gain. This discrepancy highlights the stock's volatility and the challenges it faces in maintaining investor confidence, especially given its weak long-term fundamentals and high valuation metrics.