Why is GMR Airports falling/rising?

As of 20-Aug, GMR Airports Ltd is currently priced at 91.02, reflecting an increase of 0.59 (0.65%). The stock has been gaining for the last two days, with a total return of 0.84% during this period. It has outperformed its sector by 0.93% today and is trading above all key moving averages, indicating positive momentum. However, there are concerns regarding falling investor participation, as the delivery volume has decreased by 24.53% compared to the five-day average. Despite a negative book value and high debt levels, the company reported strong quarterly results, including the highest net sales and operating profit to interest ratio, which may have contributed to the recent price increase.
In the broader market context, GMR Airports has outperformed the Sensex over the past week, with a return of 2.50% compared to the benchmark's 1.64%. However, the stock has underperformed over the past month and year, with declines of 3.46% and 4.79%, respectively. The company's high institutional holdings at 20.19% suggest that knowledgeable investors are backing it, despite the risks associated with its negative book value and high debt-to-equity ratio. This combination of strong short-term performance and underlying concerns creates a complex picture for GMR Airports' stock movement.