WTI jumped over 4% last night. From Marketwatch: 'U.S. stocks...

WTI jumped over 4% last night. From Marketwatch:
'U.S. stocks swung higher Wednesday after OPEC took an important step toward a cap on crude-oil output.
The Organization of the Petroleum Exporting Countries reached an “understanding” to limit crude production and is considering cutting production to between 32.5 million to 33 million barrels a day, The Wall Street Journal reported.
The S&P 500 index SPX, +0.53% rose 11.44 points, or 0.5%, to close at 2,171.37, led by a 4.3% surge in the energy sector.
The Dow Jones Industrial Average DJIA, +0.61% rose 110.94 points, or 0.6%, to finish at 18,339.24, aided by sharp gains by energy giants Exxon Mobil Corp. XOM, +4.40% and Chevron Corp. CVX, +0.15%

The Nasdaq Composite Index COMP, +0.24% climbed 12.84 points, or 0.2%, to end at 5,318.55.
“The nice rally in crude is one of the driving forces, along with the bounce in Deutsche Bank,” said Ian Winer, director of equity trading at Wedbush Securities.
The potential production cut, along with a drawdown in U.S. crude supplies for a fourth week, sparked a strong rally in the crude oil market, according to Colin Cieszynski, chief market strategist at CMC Markets.
November West Texas Intermediate crude CLX6, +0.15% settled at $47.05 a barrel on the New York Mercantile Exchange, its highest settlement since Sept. 8. The Energy Select Sector SPDR ETF XLE, +4.32% which tracks the performance of the S&P 500’s energy sector, soared 4.3%, its best percentage gain since Jan. 22, according to FactSet data.
Still, despite the initial euphoria over OPEC’s move to tackle the supply glut, some analysts questioned how effective the measure will be given that the production cap exceeds OPEC’s average of about 30 million barrels a day....