Just a few hours after Barack Obama finished his inaugural address and as he was making his triumphant entry to the Oval Office of the White House, the Dow Jones Industrial Average had taken a predictable dive — by 332.13 points to be exact. Next day, the yo-yo went back up, but we're a long way from recovery. Those of you with 401-Ks and retirement portfolios, beware. This is going to be a bumpy ride, and it won't be pretty. Ersatz math Now, let's see if I have this right: President Obama says he will cut taxes for 95% of...