Why is Chemtech Indust. falling/rising?

As of 16-Sep, Chemtech Industrial Valves Ltd is experiencing a price increase, currently at Rs 124.00, reflecting a rise of Rs 9.2 or 8.01%. The stock has shown strong performance recently, with a consecutive gain over the last three days, resulting in a total return of 20.98%. Additionally, it has outperformed its sector by 8.26% today. The stock's positive momentum is supported by significant improvements in its quarterly financial results, including the highest PBDIT of Rs 3.20 crore and an operating profit to net sales ratio of 33.44%. However, despite these positive indicators, the stock has a weak long-term fundamental strength, with an average return on equity (ROE) of 9.90% and a high price-to-book value ratio of 2.3, suggesting it may be overvalued compared to its peers.
In the broader market context, Chemtech's short-term performance has significantly outpaced the benchmark Sensex, which has only increased by 1.58% over the past week, while Chemtech has surged by 18.10%. This stark contrast highlights the stock's recent strength relative to the market. However, it is important to note that despite the recent gains, the stock has underperformed over the longer term, with a year-to-date decline of 42.41% compared to the Sensex's 5.43% increase. This indicates that while the stock is currently rising, it faces challenges in sustaining this momentum due to its historical performance and valuation concerns.