Stock futures were building on constructive gains into the open as a result of tame inflation data and expectations for bullish housing indicators. Global equities were back on the offensive as geo-political tensions eased after Russian separatists handed over Malaysia Flight 17 black boxes to international authorities. Strength in European markets spilled into pre-market trading with U.S. gains amplified by strong earnings and sales growth from Chipotle Mexican Grill ( CMG ), as well as upbeat earnings from Verizon ( V ) and Harley-Davidson ( HOG ).