Why is Glaxosmi. Pharma falling/rising?

As of 04-Aug, Glaxosmithkline Pharmaceuticals Ltd's stock price is currently at 2,881.40, reflecting a decrease of 55.1 points or 1.88%. The stock has been underperforming, having fallen consecutively for the last three days, resulting in a total decline of 9.82% during this period. Additionally, the stock has underperformed its sector by 2.22% today. In terms of returns, the stock has declined by 6.84% over the past week and 12.35% over the past month, although it has shown a positive year-to-date return of 28.25%. The company maintains a high management efficiency with a return on equity (ROE) of 42.32% and a low debt-to-equity ratio, which are positive factors that could support its valuation despite the recent price drop.
Broader market context indicates that while Glaxosmithkline Pharmaceuticals Ltd has struggled in the short term, the benchmark Sensex has gained 0.16% over the past week. The stock's recent performance contrasts with the broader market, as it has significantly lagged behind the benchmark and its sector. Despite the recent declines, the stock's liquidity remains adequate, with a notable increase in delivery volume, suggesting that investor participation is rising. However, the stock's moving averages indicate a bearish trend in the short term, as it is lower than the 5-day, 20-day, 50-day, and 100-day moving averages, which may contribute to the downward pressure on its price.