At first glance, July 24, 2015, seems to have been a brutal trading day for Steve Ballmer, the former Microsoft CEO. He dumped hundreds of stocks, losing at least $28 million.
But this was no panicked sell-off. Among the stocks Ballmer sold were those of the Australian mining company BHP and the global oil giant Shell. Had Ballmer lost confidence in BHP's management? Was he betting that the price of oil would not soon recover? Not at all. That very day, Ballmer also bought thousands of shares in BHP and Shell.
