Why is Sun Pharma.Inds. falling/rising?

As of 10-Sep, Sun Pharmaceutical Industries Ltd is currently priced at Rs 1,593.65, reflecting a decrease of Rs 1.45 or 0.09%. The stock has underperformed its sector by 0.47% today and is 2.43% away from its 52-week low. In terms of returns, the stock has shown a modest increase of 0.89% over the past week but has lagged behind the Sensex, which rose by 1.06%. Over the year, Sun Pharma has experienced a decline of 13.32%, while the Sensex has remained relatively flat with a decrease of 0.61%. Despite having strong long-term fundamentals, including a low debt-to-equity ratio and healthy growth in net sales and operating profit, the stock's recent performance is hindered by falling investor participation, as evidenced by a 25.86% drop in delivery volume compared to the 5-day average.
In the broader market context, while Sun Pharma's short-term performance has been positive, it has not kept pace with the benchmark index, which suggests that investor sentiment may be more favorable towards the overall market than towards the stock itself. The company's high institutional holdings at 36.75% indicate that sophisticated investors are confident in its long-term prospects, yet the stock's year-to-date decline of 15.43% contrasts sharply with the Sensex's gain of 4.21%. This divergence highlights a potential disconnect between the stock's fundamentals and its market performance, contributing to the current downward price movement.