Why is Medinova Diagno. falling/rising?

As of 22-Jul, Medinova Diagnostic Services Ltd is experiencing a price increase, currently at 42.50, reflecting a change of 0.45 or 1.07% upward. The stock has shown strong performance recently, outperforming the sector by 0.33% today and trading above its 5-day, 20-day, 50-day, 100-day, and 200-day moving averages. Over the past week, the stock has risen by 3.63%, and it has generated a return of 14.90% over the last year, significantly higher than the market's return of 0.99%. However, the company faces challenges, including a negative book value and weak long-term fundamental strength, with poor growth in net sales and high debt levels, which may pose risks to its valuation.
In the broader market context, Medinova's short-term performance has been notably better than the Sensex, which has declined by 0.47% over the past week. Despite the stock's recent gains, the overall market has not performed well, indicating that Medinova's rise is somewhat isolated from broader market trends. The company's majority shareholders are promoters, which may provide some stability, but the negative book value and declining profits raise concerns about its long-term sustainability. Thus, while the stock is currently rising, its fundamental weaknesses could impact future performance.