Malkiel says both sides in the investor debate are right. Those saying the CAPE ratio in the U.S. at 25, well above long run average of 15, are right to point this out. So are the others in the debate who point to the lack of alternatives for investors when the 10 year Treasury bond is at 2.4% and short term rates essentially at zero. Stock prices reflect the discounted present value of future cash flows from dividends and capital gains. This discount rate in 2014 has to take into acount the rate on low risk securities such as 10 year U.S. Treasury bonds and and a premium for riskiness of the stock market. Add three or four percentage points to this and one gets a low discount rate for future earnings that helps support reasoning for higher stock prices, says Malkiel. On the issue of low interest rates Malkiel's view is that they will be around for a long period because the unutilized productive labor capacity and low growth are likely to persist for a long period. Here he supports Fed chairwoman Yellen's view based on the U6 labor utilization. He also sees the long run equity returns from today's prices to be much lower than the 10% long run average. By accomodating both sides Malkiel supports a broadly diversified portfolio with adequate room for emerging markets and international stocks....