Futures advanced Tuesday after the S&P Case-Shiller home price index showed its first monthly increase in eight months, helped by an annual boost of spring buyers.
Greek lawmakers are expected to vote Wednesday and Thursday on the austerity measures, which must be passed in order to receive the next payment of its bailout.
If the government does not get the next tranche, analysts said Greece could defaulton its debt, possibly sparking a Europe-wide crisis and potential credit market freeze.
Meanwhile, demonstrators gathered in central Athensat the start of a 48-hour strike to protest the vote.
Home prices in major U.S. cities gained for the first time in eight months, according to the Standard & Poor's/Case-Shiller home-price index. The index dipped 0.1 percent on a seasonally adjusted basis, while economists polled by Reuters expected a decline of 0.2 percent. On a non-seasonallya djusted basis, however, the index gained 0.7 percent.
At 10 am ET, consumer confidence data are due and the index is seen at 60.5 for June compared to 60.8 in May. The Richmond Fed economic survey will also be released.
Microsoft edged higher after the software giant said it is making a move into cloud computing. The firm is expected to unveil an online version of its Office software later today.
In earnings news, Nike quarterly results blew past expectations after the bell Monday, sending its shares higher in after-hours trade.