Why is Solar Industries falling/rising?

As of 04-Sep, Solar Industries India Ltd is experiencing a decline in its stock price, currently at Rs 14,058.75, which reflects a decrease of Rs 237.25 or 1.66%. Today's price summary indicates that the stock underperformed its sector by 0.77%, touching an intraday low of Rs 13,821.55, which is a drop of 3.32%. The stock's performance over the past week shows a gain of 1.79%, but it has declined by 2.14% over the past month. Despite strong long-term fundamentals, including a high return on capital employed and consistent growth in net sales, the stock's current valuation appears expensive, with a price-to-book ratio of 28.9. Additionally, falling investor participation, as evidenced by a significant drop in delivery volume, may be contributing to the stock's recent price movement.
In the broader market context, while Solar Industries has outperformed the Sensex over the past year with a return of 27.24% compared to the benchmark's decline of 1.98%, its recent performance has been less favorable in the short term. The stock's underperformance relative to the sector today and the decline in trading volume suggest a cautious sentiment among investors, despite the company's strong fundamentals and high institutional holdings. This combination of factors may be influencing the stock's current downward trajectory.