Why is Medinova Diagno. falling/rising?

As of 09-Jul, Medinova Diagnostic Services Ltd is experiencing a price increase, with its current price at Rs 41.30, reflecting a rise of 1.3 (3.25%). The stock has shown strong performance today, outperforming its sector by 3.6% and reaching an intraday high of Rs 41.4. Over the past week, the stock has gained 2.99%, and it has also demonstrated solid returns over longer periods, including a 10.87% increase year-to-date and a remarkable 191.87% rise over the past five years. However, it is important to note that the company has a negative book value and weak long-term fundamental strength, with net sales growth at only 5.66% annually and a high debt-to-equity ratio, which could pose risks to its future performance.
In the broader market context, Medinova's short-term return of 2.99% over the past week significantly outpaces the Sensex's modest gain of 0.15%. This indicates that while the stock is performing well relative to the market, the underlying financial challenges, such as poor long-term growth and a negative book value, may create concerns for investors. The falling investor participation, evidenced by a 53.01% drop in delivery volume compared to the five-day average, suggests that despite the current price rise, there may be caution among investors regarding the stock's sustainability in the long term.