Why is Pfizer falling/rising?

As of 10-Sep, Pfizer Ltd. is experiencing a slight increase in its stock price, currently at 5,154.95, with a change of 11.95, representing a 0.23% rise. Today's price summary indicates that the stock's performance is inline with its sector, although it is higher than the 5-day and 200-day moving averages but lower than the 20-day, 50-day, and 100-day moving averages. Despite a recent decline in investor participation, as evidenced by a 21.11% drop in delivery volume compared to the 5-day average, the stock benefits from a high dividend yield of 3.21%. Additionally, the company showcases strong management efficiency with a return on equity (ROE) of 18.22% and a low debt-to-equity ratio, which may contribute positively to investor sentiment.
In the broader market context, Pfizer's short-term return over the past week shows a decline of 0.82%, contrasting with the Sensex, which has increased by 1.06%. Over the past month, however, Pfizer has outperformed the benchmark with a return of 3.31% compared to the Sensex's 1.96%. Despite the stock's year-to-date decline of 1.89% against the Sensex's gain of 4.21%, the positive operational cash flow and dividend payout results from June 25 may help stabilize investor confidence. Overall, while the stock is currently rising, it faces challenges in maintaining momentum due to fluctuating investor participation and mixed performance relative to the benchmark.