News Summary: Facebook stock up on no-sale pledge

RISING STOCK: Facebook’s stock is up following a disclosure that its CEO, Mark Zuckerberg, won’t sell stock in the company for at least a year.

THE WORRIES: The concern is that if Zuckerberg floods the market with additional shares, prices would go down further. Investors have been concerned about Facebook’s ability to keep increasing revenue and make money from its growing mobile audience.

THE COUNT: Since the IPO, Facebook’s stock has been down on 45 trading days, up on 29 and unchanged on two. It’s still trading at less than half the IPO price of $38.