It's that time of year. Big names of the financial world including David Einhorn, Whitney Tilson, Dan Loeb and T. Boone Pickens are at the Robin Hood Investor's Conference in New York, and they're presenting some of their best long and short ideas.

Here's a rundown.

David Einhorn reiterates his long call for Consol Energy.

Despite taking a beating on this particular position, the president of Greenlight Capital isn't throwing in the towel yet. He has held the stock for more than a year, watching it fall more than 75 percent while adding to his position along the way.