Why is Star Delta Trans falling/rising?

As of 19-Sep, Star Delta Transformers Ltd is experiencing a decline in its stock price, currently at 624.00, reflecting a decrease of 7.85 or 1.24%. The stock has underperformed its sector by 1.44% today and has been on a consecutive downward trend for the last two days, with a total decline of 1.33% during this period. Over the past week, the stock has shown a modest gain of 0.82%, but it has significantly underperformed over the year, with a return of -19.32% compared to the Sensex's slight decline of -0.67%. Despite a healthy long-term growth rate in net sales and operating profit, the stock's recent performance is hindered by poor management efficiency, as indicated by a low return on equity of 9.32%, and flat quarterly results that have raised concerns among investors.
In the broader market context, while the stock has shown some resilience with a 6.67% increase over the past month, it still lags behind the Sensex, which has gained 1.20% in the same timeframe. The stock's year-to-date performance is particularly concerning, with a decline of 31.87% against the benchmark's positive return of 5.74%. Although there has been a rise in investor participation, as evidenced by a 7.8% increase in delivery volume, the overall sentiment remains negative due to the company's flat quarterly results and underperformance relative to the market. This combination of factors contributes to the stock's current downward trajectory.