Take a look at some of Wednesday's midday movers:
Airline stocks, including United Continental, Delta, American, Southwest and JetBlue, all lost ground. The second health care worker who tested positive for Ebola traveled on Frontier Airlines the day before reporting symptoms.
The 10-year Treasury note fell below 2 percent for the first time since May of 2013 as investors looked for a safe haven.
General Motors fell despite reporting a 2 percent rise in global sales in its third quarter, driven by strong demand in China and the United States.
Wal-Mart lost ground on news that the retailer told investors that it plans to shift capital spending from building new stores to investing in e-commerce.
Charles Schwab fell after reporting third-quarter earnings that matched street expectations. Revenue grew a better-than-expected 13 percent.
Caterpillar fell. Credit Suisse lowered its price target on the firm to $108 from $119 on 2015 sales concerns.
Hewlett-Packard eked out a small gain on news the technology firm would resume its share buyback program.
St Jude Medical moved lower despite posting third-quarter earnings that beat street forecasts by a penny.