Overnight: US stocks rallied, helped by data showing a smaller-than-expected trade gap and gains by health-care stocks following an upgrade for UnitedHealth...

Overnight: US stocks rallied, helped by data showing a smaller-than-expected trade gap and gains by health-care stocks following an upgrade for UnitedHealth Group Inc. Treasury prices climbed higher ahead of an auction of 3-year notes, putting benchmark debt on track for its third day of gains in four sessions.Gold futures fell by nearly 1%, pressured by strength in the dollar as traders awaited minutes from the Federal Reserve's December meeting and monthly U.S. employment data due later this week. Oil futures rebounded. London stocks rose to levels not seen in around a week on Tuesday, driven by banks and more data confirming the U.K. recovery. European stocks pushed higher after euro-zone data showed another round of weak inflation and German jobless figures came in better than expected. London BHP +0.27%. Rio -0.64%. New York BHP -1.19%. Rio -2.22%. Base metal traded mixed.