Growing financial market uncertainties had small-business owners feeling less optimistic about the U.S. economy in November, the fourth straight month of declines, Discover reported Monday.

Of more than 1,000 owners surveyed, 68 percent said they felt economic conditions were getting worse, up from 59 percent in October, the report said. Fewer owners said business conditions in their market were improving, while more were cutting back on advertising, inventory growth, and other spending plans as a result.

"Challenges in the national economy over the past few months are no doubt influencing perceptions of small-business owners," Sastry Rachakonda, the director of Discover's business credit card, said in a statement. Despite the declines in confidence, fewer owners had reported cash flow problems over the past two months, he said.