Why is Astrazeneca Phar falling/rising?

As of 23-Jul, Astrazeneca Pharma India Ltd's stock price is currently at 8,953.35, reflecting a decrease of 74.65 points or 0.83%. The stock has underperformed its sector by 1.34% today and has been on a downward trend, losing 1.91% over the last two days. Despite a strong performance over the longer term, with a year-to-date increase of 22.07% and a 1-year return of 26.73%, recent trading activity indicates a decline in investor participation, with delivery volume falling by 33.58% against the 5-day average. While the company has demonstrated high management efficiency and consistent returns, concerns over its high valuation and declining institutional investor interest may be contributing to the stock's recent price drop.
In the broader market context, Astrazeneca's short-term performance has lagged behind the benchmark Sensex, which has gained 0.11% over the past week, while Astrazeneca's stock has decreased by 2.64% in the same period. This underperformance may reflect broader market dynamics impacting investor sentiment. Additionally, the stock's high Price to Book Value ratio and the recent decline in institutional stakes suggest that while the company has shown strong financial results, the market may be reassessing its valuation in light of these factors.