by rose-colored-coolaid » Thu Dec 04, 2008 7:47 am
In stocks, a P/E of 14 is supposed to be "fair". I think you can generalize this number to most investments. The goal is to figure out what rate of return on investment is good or bad, and a P/E of 14 returns around 7% a year. In stocks, you might not get that 7% back in dividends, because the company is reinvesting your cash in the business.
Because you mortgage a house, you must consider mortgage interest rates as well as the risk of leveraged deflation. If interest rates were over 10% for instance, you'd need a P/E below 10 just to cover the interest.
Also the maintenance costs for stocks are quite different than houses. In each, you may pay a tax when selling the asset, but in housing you pay an annual tax and have annual maintenance costs. Add it all up, and it seems to me like a good rule of thumb is that a house should return at least the mortgage interest rate plus 2-3%.
At 6% rates, my guess is a P/E of about 12 would be considered a good investment, maybe even in a falling market.