
UPS (UPS 2.43%), a company that delivers things with humans, is rethinking its relationship with Amazon. Less business, they say, because Amazon’s packages aren’t always the most profitable to haul. It’s a simple equation, really. Margins. Everyone is obsessed with margins. As if squeezing a few extra pennies out of each transaction will somehow stave off the void. Trading volume was up, a lot of shares changing hands. People buying, people selling. A frantic dance before the music stops. Oil prices, predictably, threw a tantrum. Up, then down. The market mirrored it. Everything mirrors everything else, eventually.