Why is Envirotech Sys. falling/rising?

As of 15-Sep, Envirotech Systems Ltd is currently priced at 155.80, reflecting a decrease of 0.9, or 0.57%. The stock has underperformed its sector by 1.25% today. Despite this decline, the stock has shown positive performance over the past week and month, with returns of 3.56% and 5.95%, respectively. Additionally, it has a year-to-date return of 27.13%, significantly outperforming the benchmark Sensex, which has only increased by 6.02% in the same period. However, there has been a notable drop in investor participation, with delivery volume falling by 20.63% against the 5-day average, which may indicate reduced interest among investors.
In the broader market context, while Envirotech Systems has performed well over the longer term, its short-term performance has lagged behind the Sensex, which has gained 1.20% over the past week compared to Envirotech's 3.56%. This suggests that while the stock has been strong overall, recent trading activity may be influenced by a combination of decreased investor participation and sector performance. The liquidity of the stock remains adequate, allowing for trades of Rs 0.02 crore, which could help stabilize its price in the face of current fluctuations.