Mumbai, March 25 -- COMEX gold is losing sheen on Tuesday morning after three straight days of losses but the counter stays perched above $3k mark. Positive risk sentiment in equities is also reducing demand for the yellow metal although prospect of widespread trade wars and geopolitical instability is keeping demand for the safe haven commodity intact. Currently, gold is trading at $3018.20 an ounce, almost flat on the day. Meanwhile, data from US showed S&P Global Composite PMI rose sharply, showing improved economic momentum in March, led by robust service sector growth. Manufacturing PMI disappointed, slipping into contraction territory below 50 and falling short of market expectations. Services PMI exceeded forecasts, offering optimism...