<p>U.S. stocks opened flat Tuesday despite better-than-expected earnings from investment bank Goldman Sachs. </p><p>Goldman Sachs Group Inc. (NYSE: GS) said its second-quarter profit doubled, as the investment bank saw revenues climb 30 percent, while The Coca-Cola Co. (NYSE: KO) reported its profit fell in the latest quarter, as the world's largest beverage maker blamed bad weather and challenging economic conditions for weak volume growth.</p><p>On the earnings front for Wednesday, Bank of America Corp. (NYSE: BAC) is expected to report second-quarter earnings per share of 25 cents on revenue of $22.82 billion, compared with a profit of 19 cents a share on revenue of $21.97 billion in the year-ago period, according to analysts polled by Reuters. </p>
