Stocks wavered on Friday morning following new inflation data and earnings reports from Intel and American Express, but have turned positive as of this writing. The Commerce Department said that its personal consumption expenditures price index - the Fed's preferred measure of inflation - rose 5.0% from the prior year in December, slowing from 5.5% growth in November and continuing a recent downward trend. Excluding volatile food and energy costs, the core PCE rose 4.4% from the prior year, down from 4.7% in November and in line with the consensus estimate. Intel shares fell about 8% after the chipmaker posted