Six companies bought 14 million barrels of oil from the U.S. Strategic Petroleum Reserve in a sale required by law to help fund medical research and the federal government, said the Department of Energy on Thursday. BP Oil Supply, Exxon Mobil Corp, Phillips 66, Shell Trading, Valero Marketing and Supply Company, and Macquarie Commodities Trading bought oil from the reserve, which is held in salt caverns on the Texas and Louisiana coasts. The companies bought the oil at a range from $46.98 to $47.91 a barrel, slightly below the current futures price of about $49.70 per barrel, depending on which location the crude came from and whether it was sent by pipeline or directly to vessels, which could export the petroleum.

Futures in New York added as much as 1.6 percent after rising 1.3 percent Monday. Saudi Arabia will cap shipments at 6.6 million barrels a day in August, 1 million lower than a year earlier, said Energy and Industry Minister Khalid Al-Falih. In the U.S., Halliburton Co. and Anadarko Petroleum Corp. signaled that the investment in shale fields may finally be succumbing to the oil price slump. “Yesterday’s Saudi decision to cut exports still lingers in the market,” said Bjarne Schieldrop, chief analyst for commodities at SEB Markets. The headlines that the U.S. shale oil boom is easing are also driving futures higher, he said. Click Read More below for more of the story.

Oil prices continued to climb Tuesday amid fighting in Iraq that threatened production from northern Iraq and as the relationship between the United States and Iran risked more strain. Iraqi forces on Monday clashed with fighters from Iraq’s semi-autonomous Kurdish region in the oil-rich province of Kirkuk, in a continuing standoff over Kurdish independence. The violence followed a referendum late September in which the Kurds voted overwhelmingly in favor of independence, in defiance of the central government in Baghdad and other regional powers. Click Read More below for additional information.