WASHINGTON - For risk-averse investors who are getting nervous over the recent rumblings in U.S. financial markets, it is easy to make a strong case for taking shelter temporarily in cash or bonds.

The uneasiness in the markets has shown up in the Dow Jones industrial average's steady fall to a six-month low and the return of the yield on the Treasury 30-year bond to 7.50% on the Federal Reserve's failure to cut interest rates again.

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