Theories Fly As U.S. Savings Climb

Economists ponder a riddle

On a monthly basis, the U.S. personal savings rate is nothing if not variable--moving from a low of 3.6% last April to a 33-month high of 5.7% in September. Smoothing these swings, however, reveals that the long-depressed savings rate has actually been trending upwards for the past two years (chart).

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