Why is HDFC AMC falling/rising?

As of 12-Sep, HDFC Asset Management Company Ltd is currently priced at 5,795.00, reflecting a slight decline of 1.15 (-0.02%). Despite this minor drop, the stock has shown strong performance over the past week, gaining 3.95%, and has outperformed the Sensex, which increased by 1.48% during the same period. The stock is trading close to its 52-week high, just 2.25% away from Rs 5,925.5. However, it has underperformed its sector today by 1.22% and has experienced a trend reversal after two consecutive days of gains. The stock remains above its moving averages across various time frames, indicating a generally positive trend, and there has been a notable increase in investor participation, with delivery volume rising by 30.52% against the five-day average.
In the broader market context, HDFC AMC's year-to-date return of 37.88% significantly outpaces the Sensex's 4.82%, showcasing its strong long-term fundamental strength, including a robust average return on equity of 28.86% and consistent positive results over the last ten quarters. However, the stock's valuation appears expensive with a price-to-book value of 15.2, and while it has generated a return of 31.98% over the past year, its profits have only risen by 25.7%, leading to a PEG ratio of 1.9. This discrepancy may contribute to the stock's recent price movement, as investors weigh its strong performance against its high valuation metrics.