In the long run, what matters most for investors is whether a stock they own rises in value. Stock splits don’t contribute to fundamental growth for a company, but many investors see splits as a sign of past success and future confidence in the business prospects for a given stock. Chipotle Mexican Grill (NYSE: CMG) was a high-flying stock throughout its early high-growth years, and even though the burrito giant has fallen on tougher times lately, its share price still ranks among the most expensive stocks in the market.