Morning Bid: Metals meltdown

LONDON, Feb 2 (Reuters) - By Marc Jones, Global Markets Correspondent What matters in U.S. and global markets today The slump in gold, silver and other precious metals is continuing to rattle global markets and making for a nervous start to the month. After Kevin Warsh's nomination as the new Fed Chair on Friday, a potent mix of margin calls, momentum selling and - at ​least for now - a dialing down of U.S.-Iran sabre-rattling appears to be fueling ongoing volatility in the one part of the market most pr ...