Why is C D S L falling/rising?

As of 22-Sep, Central Depository Services (India) Ltd is experiencing a decline in its stock price, currently at 1,558.50, which reflects a decrease of 23.5 points or 1.49%. The stock has underperformed its sector by 1.91% today, and while it is higher than the 20-day and 200-day moving averages, it is lower than the 5-day, 50-day, and 100-day moving averages. The stock's performance over the past week shows a slight increase of 0.32%, but it has fallen by 1.01% over the past month. Additionally, the stock has seen a significant drop in investor participation, with delivery volume decreasing by 21.54% compared to the 5-day average. Despite strong long-term fundamentals, including a healthy growth rate in net sales and operating profit, the recent negative quarterly results have raised concerns. The company reported a 20.87% decline in profit before tax and a 23.7% drop in profit after tax, contributing to its current valuation challenges.
In the broader market context, the stock's short-term return of 0.32% over the past week is lower than the benchmark Sensex, which has increased by 0.53% in the same period. Year-to-date, the stock has underperformed significantly, with a decline of 11.38% compared to the Sensex's gain of 6.59%. The stock's high institutional holdings indicate confidence from larger investors, but the expensive valuation, reflected in a price-to-book ratio of 18.6, raises concerns about its sustainability. The combination of disappointing quarterly results and a high PEG ratio of 21 suggests that the stock may be overvalued, leading to its current downward price movement.