Eli Lilly and Regeneron Pharmaceuticals are good stock-split candidates thanks to years of successes.Stock splits can get the market excited, even though nothing changes for the business fundamentally, including its future prospects. So what's the reason behind a rally following a stock split? Once a company's share price goes above a certain psychological threshold, the average investor begins to perceive the stock as "expensive" and worries about being unable to buy enough (or even whole) shares of that c ...