Investing.com - If Amazon (NASDAQ:AMZN) reports better-than-expected earnings this week, JP Morgan will not be surprised.The Wall Street firm reiterated its overweight rating and 12-month stock price for the e-commerce giant, saying there is "upside potential" to Wall Street's earnings expectations.Morgan says it likes Amazon stock "even at all-time highs," and it remains one of the firm's top picks. Amazon shares are up 80% in the past year, making it the most valuable company after Apple (NASDAQ:AAPL). JP Morgan says "company fundamentals and industry trends remain strong," and believes Amazon can continue to increase its share of e-commerce sales. Amazon is expected to release second-quarter earnings on July 26, after the market closes.