CNBCThe world's most important oil producer is now ...CNBCU.S. oil companies have quickly become the new swing factor on the world energy stage, and their ability to handle price volatility could be key in determining future oil prices. "This is a …

CNBCGuess what swing producer will affect oil pricesCNBCU.S. oil companies have quickly become the new swing factor on the world energy stage, and their ability to handle price volatility could be key in determining future oil prices. "This is a marke …