Why is Glaxosmi. Pharma falling/rising?

As of 23-Sep, Glaxosmithkline Pharmaceuticals Ltd's stock price is currently at 2,758.30, reflecting a decrease of 2.8 points or 0.1%. The stock has shown mixed performance recently, with a 1-week return of +0.48%, which indicates it has outperformed the Sensex, which declined by 0.34%. However, over the past month, the stock has decreased by 1.04%, while the Sensex has increased by 0.98%. Today's price summary indicates that the stock is performing better than its sector by 0.25%, but it is experiencing a decline in investor participation, with a significant drop in delivery volume. The stock is currently above its 5-day and 200-day moving averages but below its 20-day, 50-day, and 100-day moving averages. The company benefits from high management efficiency, as evidenced by a return on equity (ROE) of 42.32%, and it maintains a low debt-to-equity ratio, which is favorable for its financial health.
In the broader market context, Glaxosmithkline's recent performance contrasts with the benchmark's trends. While the stock has shown strong year-to-date growth of 22.77% compared to the Sensex's 5.07%, its recent decline may be attributed to the falling investor participation and lower delivery volumes. The stock's performance over the past year has been relatively stable, with a return of 1.26% against the Sensex's decline of 3.33%. Despite these positive long-term indicators, the short-term fluctuations and reduced trading activity may be contributing to the current downward movement in the stock price.