One of economists' most popular beliefs is a concept called "rational economics." It asserts that a person will do what's in his best financial interest. Only problem is, the idea fails in the real world over and over.
Taking note of the Dow's progress, The Wall Street Journal recently called its performance "eerie ... calm ... too quiet." Indeed, if things keep going at the rate they have been going so far, we're on track for the stock markets to gain more than 50% this year. Dow 18,000, anyone?