While a battery-shaped indicator lights up to show remaining battery capacity, the mile rangeindicator fluctuates wildly as it constantly projects how far you can go if you continue on your present course.
The Fed closely watches a cumbersome-sounding index, the core personal consumption expenditure deflator, for signs of inflation, and in the last few months, that indicator has dropped within the range Bernanke has been looking for--after three years of coming in above his range.