Billionaire hedge fund manager David Einhorn, who often moves a stock simply by speaking its name, on Monday kicked off the year’s most prominent investment conference by laying out a case against oil frackers, arguing these companies drill “lots and lots of holes” and burn through plenty of cash. Einhorn, who often unveils so-called short-bets against companies at these events, cited Pioneer Natural Resources Co ( PXD.N ) as a particular offender at the 20th annual Sohn Investment Conference. “We call it the motherfracker,” he said, prompting investors to kick the share price down as much as 5.3 percent. The company should trade closer to $78 a share, he said, not the $166.50 the stock is trading at now. “Pioneer is burning cash and its reserves are not growing,” said Einhorn, who runs $11 billion Greenlight Capital, adding “Pioneer ought to stop touting estimates based […]