Asian stocks followed Wall Street lower on Friday as investors fretted about lofty tech valuations and the U.S. economic outlook. A mixed set of economic indicators from China and cautious comments from Federal Reserve officials on the rate trajectory also dented sentiment.The dollar held losses while gold edged up toward $4,200 an ounce ahead of the release of reports on U.S. producer prices and retail sales along with speeches from several Federal Reserve officials later in the day. Oil prices rose over ...