Common Sense: Amazon’s Shrinking Profit Sets Off a Seismic Shock to Its Shares

For a second quarter in a row, the Internet retailer’s stock fell sharply after its earnings report, suggesting that investors may be growing wary.



Advertising: Postal Service Applies Old Promise to New Priority

Even as the Web has cost the Postal Service billions of dollars in revenue, strong growth in package deliveries from e-commerce sites has helped to offset the loss.