NEW YORK ( TheStreet) -- SunTrust ( STI) of Atlanta was loser among major U.S. banks on Wednesday, with shares down nearly 3% to close at $33.64. The broad indices all ended lower, dragged down in part by Caterpillar ( CAT), which reported an 18% year-over-year drop in third-quarter revenue to $13.423 billion, with earnings-per-share declining 43% to $1.45. Caterpillar lowered its guidance for 2013, saying it expected full-year revenue to be down 17% to $11 billion. "This year has proven to be difficult, with expected sales and revenues nearly $11 billion lower than last year," Caterpillar CEO Doug Oberhelman said in the company's earnings release. "We expect Resource Industries to be down close to 40 percent for the full year and Power Systems' and Construction Industries' sales to each be down about 5 percent," he said. "Not only is mining down from 2012, the demand for equipment has been difficult to forecast," Oberhelman said, adding that the company early in 2013 had expected order rates to improve later in the year, "based on strong mine production for many commodities."