Eli Lilly ( LLY -6.59%) is the most valuable healthcare stock in the world, with a market capitalization of around $720 billion. For a while, it looked like it might be on track to be the first healthcare company to top a $1 trillion valuation, perhaps as early as this year.

Key Takeaways Eli Lilly shares tumbled Tuesday after the drugmaker lowered its revenue forecast for the 2024 fiscal year.The maker of weight-loss drugs Mounjaro and Zepbound said sales grew slower than expected in the fourth quarter.

Shares of Eli Lilly & Co. LLY sank 0.30% to $797.48 Monday, on what proved to be an all-around great trading session for the stock market, with the S&P 500 Index SPX rising 0.16% to 5,836.22 and the Dow Jones Industrial Average DJIA rising 0.86% to 42,297.12. The stock's fall snapped a three-day winning streak.