A look at the day ahead in European and global markets from Tom Westbrook Traders were hunkering down into the weekend, with threats flying between the U.S. and Iran, and nerves rippling through markets from listed private equity funds. PMI surveys, U.S. PCE and GDP data and a smattering of corporate earnings headline the calendar, but politics and the risk of war seemed to loom largest in investors' minds as the dollar headed for its largest weekly rise in four months. U.S. President Donald