Why is Thyrocare Tech. falling/rising?

As of 01-Aug, Thyrocare Technologies Ltd is experiencing a decline in its stock price, currently at Rs. 1,316.00, which reflects a decrease of Rs. 8.7 or 0.66%. The stock reached a new 52-week high of Rs. 1,376.4 earlier in the day but has since fallen after three consecutive days of gains. Despite this recent drop, Thyrocare has shown strong performance over the past month, with a return of 34.92%, significantly outperforming the Sensex, which declined by 3.70%. The company has reported high management efficiency and strong financial results, including a net profit growth of 56.61% and a high return on equity (ROE) of 20.45%. However, the stock's valuation appears expensive, with a Price to Book Value of 12.8, and 100% of promoter shares are pledged, which could contribute to downward pressure in a falling market.
Broader market context indicates that while Thyrocare has outperformed the benchmark in the long term, its recent performance contrasts with the Sensex's decline of 1.06% over the past week. The stock's liquidity remains adequate, but there has been a notable drop in investor participation, with delivery volume falling by 56.38% against the five-day average. This decline in trading activity, coupled with the high valuation and pledged shares, may be influencing investor sentiment negatively, contributing to the stock's current downward movement despite its strong historical performance.