Why is Shriram Pistons falling/rising?

As of 22-Aug, Shriram Pistons & Rings Ltd is experiencing a price increase, currently at Rs. 2,600.00, reflecting a rise of 8.0 points or 0.31%. The stock has recently hit a new 52-week and all-time high of Rs. 2,671, indicating strong upward momentum. Over the past week, the stock has outperformed the benchmark Sensex with a return of +5.95% compared to the Sensex's +0.88%. Additionally, the stock is trading above its 5-day, 20-day, 50-day, 100-day, and 200-day moving averages, suggesting a positive trend. However, there has been a notable decline in investor participation, with delivery volume dropping by 53.43% against the 5-day average. Despite this, the company exhibits high management efficiency with a return on equity of 16.83% and a low debt-to-equity ratio, which supports its healthy long-term growth prospects.
In the broader market context, Shriram Pistons has shown a strong short-term performance relative to the Sensex, outperforming it significantly over the past week and month, with returns of +5.95% and +7.39%, respectively, while the Sensex has seen a decline of -1.07% over the same month. The increasing participation of institutional investors, who have raised their stake by 0.75% in the last quarter, further bolsters confidence in the stock's fundamentals, as these investors typically possess greater analytical resources. This combination of strong performance metrics and institutional backing contributes to the stock's rising price, despite the recent drop in trading volume.