(Bloomberg) -- Goldman Sachs Group Inc. ramped up its gold price forecast to $3,300 an ounce by year-end, citing stronger-than-expected central bank demand and solid inflows into bullion-backed exchange traded funds.Most Read from BloombergThey Built a Secret Apartment in a Mall. Now the Mall Is Dying.Why Did the Government Declare War on My Adorable Tiny Truck?How SUVs Are Making Traffic WorseTrump Slashed International Aid. Geneva Is Feeling the Impact.These US Bridges Face High Risk of Catast