Why is Medinova Diagno. falling/rising?

As of 17-Jul, Medinova Diagnostic Services Ltd is experiencing a price increase, with its current price at Rs 42.00, reflecting a rise of 1.4 (3.45%). The stock has shown strong performance today, outperforming its sector by 3.08% and reaching an intraday high of Rs 42.25. Over the past week, the stock has gained 3.45%, and its year-to-date return stands at 12.75%, significantly higher than the Sensex's 5.27%. However, despite this positive movement, the company has a negative book value and weak long-term fundamental strength, with net sales growing at only 5.66% annually over the last five years. This, combined with a high debt-to-equity ratio and a decline in profits by 4.5% over the past year, raises concerns about its sustainability.
In the broader market context, Medinova's short-term performance has been notably better than the Sensex, which has declined by 1.12% over the past week. While the stock's recent gains are encouraging, the overall market sentiment appears to be cautious, as indicated by the falling investor participation and a significant drop in delivery volume. The stock's liquidity remains adequate for trading, but the underlying risks associated with its negative book value and poor long-term growth prospects may temper investor enthusiasm moving forward.