Pfizer Inc. ($PFE) has seen a notable increase in its stock price recently, with some investors expressing optimism about the company's performance. One user highlighted a significant 24% rise in the stock, suggesting that it may be a missed opportunity for those who did not invest earlier. Another investor noted that the stock is currently yielding a 5.5% return, indicating that it could be a worthwhile investment for those willing to wait. The recent uptick in Pfizer's stock has been attributed to activism-induced factors, although the sustainability of this spike remains uncertain. As investors continue to monitor the situation, there is anticipation for further developments regarding the company's prospects.