Billions of dollars have poured into leveraged and inverse funds that can magnify the market’s swings. Before you join in, you’d better understand what you’re in for. Shortly before Daniel Kahneman ...

His policies are the same, but he is less restrained, is more hardened, and acts as if he sees no boundaries. This isn’t some old, dead virtue, a relic of the past. It lives, and today it is deeply ...