Both Amazon and Costco have great underlying businesses. Each company has multiple ways to grow. However, one stands out as ...

The primary reason behind the tremendous stock performances of Amazon and Costco is that both companies have great underlying businesses. However, they're very different from each other.

You couldn't have gone wrong buying shares of Amazon(NASDAQ: AMZN) or Costco Wholesale(NASDAQ: COST) in the two companies' early days. A $10,000 investment in Costco when the giant wholesaler went ...