US stocks turned in a mixed performance in early trading Wednesday, as Boeing's latest aircraft problem overshadowed strong earnings from leading banks.
At around 15:35 GMT, the Dow Jones Industrial Average was at 13,496.45, down 38.44 points (0.28 percent).
The broad-based S&P 500 was down 1.76 (0.12 percent) at 1,470.58.
But the tech-heavy Nasdaq Composite rose 4.87 (0.16 percent) to 3,115.6491.
The middling results came as Boeing returned to the headlines on news that a 787 Dreamliner plane operated by All Nippon Airways made an emergency landing in Japan.
ANA and Japan Airlines, Japan's two biggest airlines, grounded their 787 fleets pending safety checks, a move that follows a recent series of incidents that prompted a US federal safety investigation. Boeing shares were off 3.4 percent Wednesday.
Elsewhere, US banking giant JPMorgan Chase reported fourth-quarter earnings of $1.39 per share, well above the market consensus of $1.16 per share. Shares were recently trading 0.4 percent lower.
Goldman Sachs, another large bank, also bested earnings by a wide margin. Goldman's quarterly profit came in at $5.60 per share, well above the $3.78 forecast by analysts. Goldman shares were up 2.5 percent.
Shares of General Motors fell 4.4 percent following a report from a European automobile trade association that put its 2012 sales at the lowest level since 1995. Shares of Ford also retreated, by 1.4 percent.
Fast-food company Chipotle Mexican Grill was 6.1 percent lower after releasing a weak fourth-quarter outlook.
Cobalt International Energy, an exploration company, lost 6.1 percent after announcing it would issue an additional 40 million shares.
Also issuing new shares was Onxx Pharmaceuticals, which was off 2.7 percent.
Dell, which has rallied in recent days on news it might go private, retreated 4.1 percent Wednesday.
Among the bigger gainers Wednesday were technology giant Apple, which rose 3.5 percent following losses in recent days.
Research in Motion, a volatile stock recently, jumped 4.6 percent.
Genworth Financial gained 9.9 percent.
Alnylam Pharmaceuticals was 5.5 percent higher.
Bond prices rose. The yield on the 10-year US Treasury fell to 1.82 percent from 1.83 late Tuesday, while the yield on the 30-year US Treasury dropped to 3.01 percent from 3.02 percent.
Bond prices and yields move in opposite directions.