Treasury Warns Of 'Quicksilver' Risk In High-Valuation Market

 | Mar 26, 2015 02:05AM ET

The Office of Financial Research at the US Treasury, published a brief on March 17 , warning of historically high valuations in the US stock market, and the potential for a sudden and painful drop in prices. It’s worth a read.

The eventual move by the Fed to raise interest rates, while likely modest, and while at rates well below rates that have not been a problem for stocks in the past, is likely to cause a degree of shock that will create a correction.

The basic argument by the OFR is that when certain ratios reach 2 standard deviation distances above their very long-term averages, they create great risk of a corrective movement back toward the long-term average. That “mean reversion” tendency is a real thing, but when and whether the reversion takes place is hard to pinpoint.

They make note of the fact that the stock market has seemingly stretched valuations, at the same time that the economy as they describe it is not doing all that well.

The three indicators they present are:

  • Shiller CAPE Ratio
  • Tobin Q Ratio
  • Buffet Market Value to GDP Ratio

The CAPE Ratio (10-year CPI adjusted P/E) is approaching 2 standard deviations, and is at the approximate level of 2007. The only two times it exceeded 2 standard deviations by this measure was in 1929 and 1999 — both bad years to own stocks. However, the indicator did not signal the 2008 crash early enough to save a lot of money.