Nerves dominate before U.S. retail numbers

The dollar was set for a second week of gains on Friday while stock markets fell ahead of a handful of major U.S. and Chinese data releases which may do little to settle growing nerves over the outlook for the world's two biggest economies. Wall Street was set to open lower after another big drop in Apple shares on Thursday spilled over into weakness for other major stock markets. European shares drew some strength from solid economic growth numbers from Germany and other euro zone economies, bu