Suddenly, the stock market is worried about Amazon's profit-free …

Amazon shares have had a terrible start to 2014. And today, it’s gotten a lot worse.Shares of the online retail behemoth are down about 9% today alone. They’ve fallen 23% in 2014, compared to roughly flat performance for the S&P 500.As we discussed yesterday, the e-commerce giant’s revenue growth has been astonishing for more than a decade. But Jeff Bezos […]