Futures snapshot at 8:42:

* S&P 500 e-minis ESc1 were up 4.5 points, or 0.23 percent, with 172,708 contracts changing hands.

* Nasdaq 100 e-minis NQc1 were up 5.25 points, or 0.13 percent, in volume of 27,230 contracts.

* Dow e-minis 1YMc1 were up 40 points, or 0.23 percent, with 30,141 contracts changing hands.