Why is Diamond Power falling/rising?

As of 17-Sep, Diamond Power Infrastructure Ltd is experiencing a decline in its stock price, currently at Rs 153.10, which represents a decrease of Rs 3.2 or 2.05%. The stock has underperformed its sector by 1.13% today and has been on a downward trend for the last two days, accumulating a total loss of 3.35%. Despite a positive long-term performance, with a 5.59% return over the past year and significant growth in net sales and profit after tax in recent quarters, the company faces challenges such as a negative book value and high debt levels. Additionally, a notable decrease in promoter confidence, with a 5.98% reduction in their stake, may be contributing to the stock's recent struggles.
In the broader market context, the stock's short-term performance contrasts with the benchmark Sensex, which has increased by 1.56% over the past week. While Diamond Power has shown a positive return of 3.87% over the last week, its year-to-date performance of 0.36% lags behind the Sensex's 5.83%. The stock's liquidity remains adequate for trading, but falling investor participation, as indicated by a significant drop in delivery volume, suggests a weakening interest among investors. Overall, the combination of strong recent financial results and long-term outperformance is overshadowed by concerns regarding fundamental weaknesses and declining confidence from promoters, leading to the current price decline.