Alcoa traditionally kicks off each corporate reporting season, as it is the first Dow component to release its figures from the previous quarter. The company report released after markets closed Tuesday showed earnings in line with expectations and revenues ahead of expectations.
By close of trading on Wall Street Wednesday, the Dow Jones industrial average added 61.66 points, or 0.46 percent, to 13,390.51. The Nasdaq composite gained 14 points, or 0.45 percent, to 3,105.81. The Standard and Poor's 500 added 3.87 points, or 0.27 percent, to 1,461.02.
On the New York Stock Exchange, 2,050 stocks advanced and 962 declined on a volume of 3.6 billion shares traded.
The 10-year treasury note rose 2/32 to yield 1.863 percent.
Against the dollar, the euro fell to $1.3058 from Tuesday's $1.3081. The dollar was higher at 88.04 yen from 87.04 yen.
In Tokyo, the Nikkei 225 index added 0.67 percent or 70.51 points to 10,578.57.
In London, the FTSE 100 index gained 0.74 percent, 45.02, to 6.098.65.