* Gold on track for worst day since June 2013
* Silver plunges 13.8%, biggest daily decline since Oct. 2008
* U.S. PPI rebounded more than expected in July
* Gold is down over $100 since Monday’s close
* Gold on track for worst day since June 2013
* Silver plunges 13.8%, biggest daily decline since Oct. 2008
* U.S. PPI rebounded more than expected in July
* Gold is down over $100 since Monday’s close