The Conference Board's measure of CEO confidence increased in the third quarter following an increase in the second quarter. The measure now stands at 63, up from 55 in the second quarter -- readings of more than 50 reflect more positive responses than negative responses.

Sixty-eight percent of CEOs said economic conditions had improved compared to six months ago; only 32% said the same in the last quarter, according to the survey for the index.

"CEOs have grown considerably more optimistic in their short-term outlook," said Lynn Franco, director of The Conference Board Consumer Research Center. "Although nearly 60 percent say they've scaled back capital spending plans since January, growing optimism over the past several quarters should translate into increased spending in 2010."

The measure's survey includes approximately 100 CEOs.