Investors who buy the stock today get access to an outstanding long-term growth story.Amazon (AMZN -0.16%) has not been the star of 2025. As of mid-September, the stock is up only about the mid-single digits year to date, while the S&P 500 is up roughly in the low teens. That gap has opened even as the retailer and cloud leader posted strong financial results and guided to solid growth.Amazon, of course, is the e-commerce and cloud-infrastructure giant behind online retail, Prime, and Amazon Web Services (A ...