Markets Correct July 20, 2011 Dear Investor: From April 29 to June 24, the S&P 500 lost nearly 8%. The subsequent recovery has been dramatic, but markets are now showing strain. Markets never go straight up for sustained periods of time. A selloff of 20% at some point would be historically justified. Anyone who tries to time that event, however, is likely to be miserably wrong. For every story of flawless timing that trades perfectly around...