Why is Vijaya Diagnost. falling/rising?

As of 05-Aug, Vijaya Diagnostic Centre Ltd is experiencing a decline in its stock price, currently at Rs 1,063.00, which represents a decrease of Rs 23.6 or 2.17%. The stock has underperformed its sector today by 2.13%, touching an intraday low of Rs 1,063. The stock's performance over the past week shows a decline of 5.05%, while it has gained 4.14% over the past month. Despite a strong long-term performance with a 32.88% increase over the past year and a remarkable 179.77% rise over three years, recent investor participation has fallen significantly, with delivery volume dropping by 41.14% against the five-day average. The company maintains a high management efficiency with a return on equity of 17.31% and low debt levels, but concerns about poor long-term growth and high valuations may be contributing to the current price decline.
In the broader market context, Vijaya Diagnostic's short-term performance is notably worse than the benchmark Sensex, which has only declined by 0.77% over the same week. While the stock has shown consistent returns over the past three years, the recent flat results and low cash reserves reported in June, along with a high PEG ratio of 3.6, suggest that the stock may be overvalued compared to its peers. This combination of declining investor interest, concerns about growth, and high valuations could be influencing the stock's downward movement despite its historical performance.