Shares of Amazon.com Inc. AMZN, +0.91% gained 0.2% in afternoon trading Monday, after falling 2.2% in the previous session in the wake of package delivery giant FedEx Corp.’s FDX, +1.17% big profit miss and warning. Analyst Justin Post at BofA Securities said Amazon will not be immune from the global slowdown in package volumes FedEx has suffered, but he sees four reasons Amazon should be less impacted: 1) Amazon no longer ships with FedEx; 2) Amazon has well over 50% of volumes in the U.S., while FedEx said weakness in Europe and Asia were the main reason for its troubles; 3) Amazon likely has a higher-income average consumer than its biggest competitors — Walmart Inc. WMT, +0.86%, Target Corp. TGT, +0.41% and eBay Inc. EBAY, -1.55% — and saw “no discernible trade-down” away from discretionary items; and 4) with a wide third-party selection and fast delivery speeds, Amazon is expected to take market share from competitors that may be using FedEx. Post reiterated his buy rating on Amazon and his $170 stock price target, which implied about 37% upside from current levels. Amazon’s stock has run up 16.5% over the past three months, while FedEx shares have tumbled 29.4% and the S&P 500 SPX, +0.69% has gained 5.6%.