After a brief slide, stock prices in the U.S. turned around and headed up on June 13. Neither the slide nor the upward bounce was of historic significance by itself. The S&P 500 closed June 8, Thursday, at 2433.78. It closed the next day at 2,431.23. The following Monday, down somewhat again, to 2,429.48. So, as I say, on Tuesday it rose, closing at 2,441, reversing (by more than double) the losses of the two previous days. This could be simple "random walk" stuff. But ... what brings it to mind is the way this particular bounce immediately became an item in political debate. Because June 13th happened to be the day Attorney General Jeff Sessions testified before Congress about Russia, Comey, and so forth, Trumpites drew a connection via social media even as Sessions was talking. Mr. Market presumably approves of Trump, wants a vigorous Trump administration, and so cheered as Session rebuked that administration's foes. That's their story. It has some obv...