By Joel Jose (Reuters) -Goldman Sachs on Monday upgraded its stance on global equities to "overweight" from "neutral" over the three-month horizon, citing improving economic momentum across regions, attractive valuations and growing support from monetary and fiscal policy. "We think that good earnings growth, Fed easing without a recession and global fiscal policy easing will continue to support equities," Goldman analysts said in a note. The analysts held their rating at "overweight" for the next 12 ...