Why is Bharti Airtel PP falling/rising?

As of 21-Aug, Bharti Airtel Ltd Partly Paidup is experiencing a price increase, currently at Rs 1,475.65, reflecting a rise of Rs 18.95 or 1.3%. The stock has shown strong performance recently, gaining 4.14% over the past week and 2.83% over the last month. It has also outperformed its sector by 1.57% today and has been on a consecutive gain streak for the last four days. The stock reached an intraday high of Rs 1,515, indicating a 4% increase at that point. Additionally, it is trading above all key moving averages, which suggests a positive trend. However, there has been a significant drop in investor participation, with delivery volume falling by 90.37% compared to the five-day average, which could indicate a potential concern for future momentum.
In the broader market context, Bharti Airtel's recent performance has been notably strong compared to the benchmark Sensex, which has only gained 1.74% over the past week. Year-to-date, Bharti Airtel has achieved a remarkable return of 25.29%, significantly outpacing the Sensex's 4.94%. This trend is further highlighted by its one-year return of 38.47% against the Sensex's modest 1.35% increase. The stock's robust performance relative to the benchmark suggests that investor sentiment remains positive, despite the recent decline in trading volume. Overall, the combination of strong returns and positive technical indicators supports the stock's rising price.