Is It Too Late to Buy Eli Lilly Stock?

Shares of Eli Lilly (LLY 0.84%) can't seem to stop rallying. For investors thinking about whether to buy the stock, it can be both exciting and discouraging to see it rise. While it's encouraging to see the stock going in the right direction, it's also potentially discouraging to not see it dip in value, where there might be a potential buying opportunity.Given the stock's impressive gains -- it's up around 80% in just 12 months -- is it too late to invest in Eli Lilly right now? Should investors continue w ...