(Adds details from note, context in paragraph 3-10) By Joel Jose Sept 29 (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 months. Global equities have surged to record highs recently, driven by optimism that the U.S. Federal Reserve has begun cutting interest rates early enough to stave off a recession. The MSCI World Index, which is dominated by U.S. s

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