A possible Greek deal lifted the markets to a sharply higher open with the Dow soaring 133 points to 18,149. Nasdaq climbed 41 points to 5,158.

On the upside

Williams Cos. (NYSE: WMB) rejected a $48 billion buyout offer and announced that it was exploring strategic options to increase shareholder value.

Fitbit (NYSE: FIT) stock continued soaring.

Speculation that Greece may be close to deal lifted shares of National Bank of Greece (NYSE: NBG).

On the downside

Investors locked in profits on Magnum Hunter Resources (NYSE: MHR).

Sequential Brands (Nasdaq: SQBG) will acquire Martha Stewart Living (NYSE: MSO) in a cash and stock deal valued at approximately $353 million.

Shares of Ambarella (Nasdaq: AMBA) continued tumbling.

In the broad market, advancing issues outpaced decliners by a margin of nearly 7 to 3 on the NYSE and by more than 2 to 1 on Nasdaq. The broader S&P 500 climbed 16 points to 2126. Bitcoin added $2 to $245.