Bristol-Myers Squibb (BMY) has reduced its full-year earnings guidance by about 3%, leading to a 5.1% drop in its stock price amid concerns over patent losses and declining revenue from its oncology drug Revlimid. Despite exceeding analyst expectations with first-quarter earnings of $1.96 per share and total revenues of $11.65 billion, the company's revised outlook has raised alarms for investors, indicating potential revenue losses of $500 million. As Bristol-Myers faces these challenges, analysts will closely monitor its upcoming reports for strategic adjustments and impacts on its long-standing dividend policy.