CNBC's Kayla Tausche reports Facebook options begin trading today, and the impact that's likely to have on the company's stock, with Michael Khouw, CRT Group head of equity derivatives.

CNBC's Julia Chatterly reports on recent events in Greece, the country's future and the recapitalization of Greek banks.

Thomas Lee, JPMorgan chief U.S. equity strategist, weighs in on what's driving U.S. stocks and how to invest in the markets now.