Which Lesson? January 13th, 2012 Dear Investor: The smallest year’s change in the S&P 500 since 1950 hid its fair share of intervening chaos. The index ended at 1257.60 after starting at 1257.64, a statistical journey to nowhere. But the chart shows the high drama, with the market first rising, then declining 21% and reaching an intraday low of 1075 on October 3 before rallying 17% to close the year right where it began: 1/11/11            ...