Why is Star Delta Trans falling/rising?

As of 08-Sep, Star Delta Transformers Ltd is currently priced at 643.00, reflecting a rise of 2.25 (0.35%). The stock has been gaining for the last two days, with a total return of 0.63% during this period. It opened with a gain of 2.21% today and reached an intraday high of Rs 654.9. Despite this recent uptick, the stock has underperformed in the longer term, with a year-to-date decline of 29.80% and a one-year return of -20.62%. The company has a low Debt to Equity ratio and has shown healthy long-term growth in net sales and operating profit. However, it also faces challenges such as poor management efficiency, indicated by a low ROE of 9.32%, and flat results in the most recent quarter, which may dampen investor sentiment.
In the broader market context, the stock's recent performance is somewhat in line with sector trends, but it has lagged behind the benchmark Sensex, which has gained 0.53% over the past week. While the stock has shown a positive return of 4.43% over the past month, its year-to-date performance starkly contrasts with the Sensex's 3.39% increase. The falling investor participation, as evidenced by a significant drop in delivery volume, suggests that while there may be short-term gains, the overall market sentiment towards the stock remains cautious.