Why is Envirotech Sys. falling/rising?

As of 10-Sep, Envirotech Systems Ltd is experiencing a price increase, with its current price at Rs 161.55, reflecting a rise of Rs 11.55 or 7.7%. The stock is trading close to its 52-week high, just 1.52% away from Rs 164, and has outperformed its sector by 6.59%. Additionally, the stock has shown strong performance over various time frames, with a 1-week return of 10.65% and a 1-month return of 16.64%. However, there is a notable decline in investor participation, as the delivery volume has decreased by 65.65% compared to the 5-day average, which may indicate a potential concern regarding sustained interest in the stock.
Broader Market Context: In comparison to the benchmark Sensex, which has increased by only 1.04% over the past week, Envirotech's performance is significantly stronger. The stock's year-to-date return of 31.82% also far exceeds the Sensex's 5.62% gain, highlighting its robust performance in the market. Despite the drop in delivery volume, the liquidity remains adequate for trading, suggesting that while there may be some caution among investors, the overall market sentiment towards Envirotech Systems Ltd remains positive, contributing to its rising stock price.