Back in October 2010, the Federal Reserve undertook Operation Twist, whereby it sold $400 million in short-term bonds (maturities of three years or less) in order to fund the buying of $400 million long-term bonds (maturities of six years or more). In addition, the Fed would continue to buy mortgage-backed securities. The goal was to flatten the yield curve and lower long-term interest rates. Well, interest rates are down. On Friday, 24 August, the interest on the 10-year Treasury note was 1.68 percent. In July, it had dropped to 1.4 percent. In August 2002, 10 years ago, it was about 4.5 percent, and the rates rose to more than 5 percent in 2007.In July 2011, 10.4 percent of the U.S. debt was in 10-year notes or longer. As of March, the...