Why is Diamond Power falling/rising?

As of 19-Aug, Diamond Power Infrastructure Ltd's stock price is currently at Rs 151.15, reflecting an increase of Rs 4.0 or 2.72%. The stock has shown a trend reversal, gaining after two consecutive days of decline, and it outperformed its sector by 1.54% today. The stock reached an intraday high of Rs 154.4, indicating a positive movement. However, despite this short-term gain, the stock has experienced a decline of 10.35% over the past month. The company has reported positive results for the last seven consecutive quarters, with net sales growing significantly, but it also faces challenges such as a negative book value and a high debt-to-equity ratio, which contribute to concerns about its long-term fundamental strength.
In the broader market context, the stock's short-term performance of +1.27% over the past week is slightly below the benchmark Sensex, which has increased by 1.76% in the same period. While Diamond Power has outperformed the BSE500 over the last three years and one year, its long-term growth has been poor, with net sales declining at an annual rate of -11.40% over the last five years. Additionally, the reduction in promoter confidence, as indicated by a decrease in their stake, may also weigh on investor sentiment. Overall, while the stock is experiencing a short-term rise, the underlying fundamentals and market conditions present a mixed outlook.