Last week, our estimate of prospective 12-year nominal annual total returns on a conventional portfolio mix (invested 60% in the S&P 500, 30% in Treasury bonds, and 10% in Treasury bills) fell to the lowest level in U.S. history, plunging below the level previously set at the peak of the 1929 market bubble. Yes, interest rates are low, but with them, so are the discount rates and long-term returns embedded into prices.