Both reports come ahead of the key government non-farm payroll report on Friday. Economists surveyed by Reuters expect to see a gain of 90,000 in June following an increase of 69,000 in the month prior.

Also on the economic front, the Institute for Supply Management releases its June non-manufacturing index at 10:00 am ET. A Reuters poll of analysts predicted a read of 53.0, down from 53.7 in May.

Moody's Investors Service changed the outlook on Barclays to "negative" from "stable," citing the uncertain management outlook after recent departures in the light of the Libor scandal.

Many retailers posted weaker-than-expected same-store sales in June, as consumers pulled back on spending amid concerns about jobs and the economy. Macy's , Costco , Wet Seal and The Buckle were among some of the companies that disappointed.

Auto parts supplier Visteon said it would offer some $800 million to take full control of South Korean car air conditioner maker Halla Climate Control, but analysts cautioned that a key shareholder may hold out for more.

Buyout fund CarlyleGroup said it had acquired 49 percent of China's MandarinHotel Holdings for an undisclosed sum, giving it control of the company.