First Solar, higher oil prices boost energy stocks By: MarketWatch April 17, 2012 at 11:17 AM EDT Energy sector gets a lift from traditional and alternative sides of the market while Repsol vows to challenge Argentina’s plans to nationalize YPF. Read More >> Related Stocks: Cabot Oil & Gas First Solar Nabors Industries Newfield Exploration Valero Energy Ypf Sociedad Anonima ADR