Members of the Organization of the Petroleum Exporting Countries agreed in principle Friday to a deal that would lift output by a nominal 1 million barrels a day, though the effective increase would be smaller, reports said. According to The Wall Street Journal, the deal would effectively add 600,000 barrels a day to global markets. The effective boost would be smaller than the headline figure because although each country would share a portion of the boost, not all can boost production right now. August Brent crude futures was up $1.55, or 2.1%, to $74.60 a barrel, while West Texas Intermediate futures advanced $1.70, or 2.6%, to $67.24 a barrel.