Investors also digested a rally in Japanese stocks as the yen fell lower Tuesday. This came as Japan's finance minister repeated that the country would intervene in the currency market if the rise in the yen continues and starts to hurt the country's economy.
Back in the U.S., data due for release include wholesale trade and Job Openings and Labor Turnover Summary (JOLTS), both due at 10 a.m ET.
The National Federation of Independent Business' small business optimism index rose for the first time this year, up 1.0 point from a two-year low in March to 93.6 in April, Reuters said. The figure remained below the 100 reading in December 2014 and its 42-year average of 98.
Treasury yields held a touch higher in early morning trade. The U.S. dollar index was mildly higher, with the euro near $1.137 and the yen at 109.10 yen against the greenback as of 8:16 a.m. ET.
After the bell on Tuesday, Disney reports earnings.
In other earnings news, Credit Suisse swung to a net loss in the first quarter, although the numbers beat expectations. The stock was up over 5 percent in mid-morning trade in Europe.
Solar City reported a wider than expected loss and cut its forecast for solar panel installations after Monday's close. The stock fell nearly 20 percent in after-hours trade.
Meanwhile Invensense, which makes motion tracking sensors, posted a loss of $0.25 per share for the fourth quarter. Sotheby's swung to a first-quarter loss but said the second quarter is off to a strong start. The stock rose on the news.
Bill Ackman's Pershing Square said it was seeking to sell $800 million in shares in Zoetis, the New York Times reported, citing sources.