Why is Aditya AMC falling/rising?

As of 25-Aug, Aditya Birla Sun Life AMC Ltd is experiencing a decline in its stock price, currently at Rs 871.20, which reflects a decrease of Rs 13.3 or 1.5%. The stock has underperformed its sector by 1.31% today, and while it is 4.68% away from its 52-week high, it remains higher than its 20-day, 50-day, 100-day, and 200-day moving averages, although it is lower than the 5-day moving average. Despite a strong long-term fundamental strength indicated by an average Return on Equity (ROE) of 25.98% and positive quarterly results, the stock's valuation is considered very expensive with a Price to Book Value of 6.7, which may be contributing to the recent price decline. Additionally, a significant drop in investor participation, with delivery volume falling by 36.18% against the 5-day average, suggests a decrease in demand.
In the broader market context, the stock has shown a positive return of 1.18% over the past week, outperforming the Sensex, which returned 0.45% during the same period. However, the stock's performance over the last year has been strong, generating a return of 17.31%, which is significantly higher than the Sensex's 0.68%. This indicates that while the stock has had a strong long-term performance and has outperformed the benchmark in various timeframes, the current price movement may reflect concerns over its high valuation and reduced investor interest, impacting its short-term performance.