Sell In May? June Swoon? Never Fear...

One of the longstanding idiosyncrasies of stock market investing is patterns. Human beings are keen on finding them, often where they don't exist. Scientists even have a word for it: "apophenia." It means seeing connections and patterns that aren't meaningful, and we all fall victim to it. The crackpot version of our tendency to see patterns is the conspiracy theory. Odd lights flash in the sky and we imagine aliens are among us. People become transfixed by famous murders and ascribe motives t...