Why is Pfizer falling/rising?

As of 09-Oct, Pfizer Ltd. has experienced a price increase, currently trading at 5,260.00, reflecting a rise of 74.35 or 1.43%. The stock opened with a gain of 2.95% today and reached an intraday high of Rs 5,338.5. Despite this positive movement, there has been a notable decline in investor participation, with delivery volume dropping by 70.88% compared to the 5-day average. The stock has outperformed its sector by 0.49% today, and while it has shown a modest increase of 2.12% over the past week, it remains down 7.98% over the past year. Positive factors contributing to the stock's performance include high management efficiency, indicated by a return on equity (ROE) of 18.22%, and a low debt-to-equity ratio, which supports its stability.
In the broader market context, Pfizer's short-term performance has outpaced the Sensex, which has risen by 1.47% over the same week. However, the year-to-date performance of Pfizer shows a slight increase of 0.11%, contrasting with the Sensex's stronger gain of 5.16%. The stock's high dividend yield of 3.19% may also attract investors looking for income, although the overall trend over the past year and three years indicates underperformance compared to the benchmark. The combination of these factors suggests that while Pfizer is experiencing a short-term rise, its long-term performance relative to the market remains a concern.