Gold, silver up a bit on mild safe-haven demand, technical buying Gold and silver prices are slightly higher in midday U.S. trading Wednesday, with silver scoring an eight-month high. Both markets are pausing after posting solid gains Tuesday, amid wobbly global stock and financial markets that prompted some safe-haven demand for the metals, especially on Tuesday. Chart-based buying was also featured in the two precious metals market today. Rising bond yields this week are a bearish element for gold and…