Why is Aditya AMC falling/rising?

As of 11-Sep, Aditya Birla Sun Life AMC Ltd is experiencing a decline in its stock price, currently at 853.25, reflecting a decrease of 15.0 points or 1.73%. Despite this drop, the stock has shown positive performance over the past week, gaining 2.55%, and has outperformed the Sensex over the last year with a return of 16.18%. Today's price summary indicates that the stock is underperforming its sector by 1.62%, although it remains above its 5-day, 50-day, 100-day, and 200-day moving averages. Notably, there has been a significant increase in investor participation, with delivery volume rising by 258% compared to the 5-day average, suggesting a growing interest in the stock despite its current price decline. The company also boasts strong long-term fundamentals, with an average Return on Equity of 25.98% and record net sales and profits reported in June.
In the broader market context, the stock's short-term performance has outpaced the Sensex over the past week, but it has lagged behind in the longer-term comparison, with a year-to-date return of 2.19% compared to the Sensex's 4.36%. While the stock has demonstrated strong historical performance, it is currently trading at a premium valuation with a Price to Book Value of 6.6, which may be contributing to the recent price decline as investors weigh the high valuation against the company's growth prospects. The PEG ratio of 1.5 indicates that, despite the stock's solid returns, it may be perceived as expensive relative to its earnings growth, which could be influencing investor sentiment and leading to the current price movement.