Dean Foods, Toll Brothers, Dyanavax, Orexigen and Comcast are big market movers

NEW YORK – Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

Dean Foods Co. (DF), up $1.98to $16.40

The milk company reported better-than-expected quarterly financial results and a stronger-than-expected financial outlook.

Toll Brothers Inc. (TOL), up 73 cents to $32.95

The homebuilder reported a 29 percent boost in preliminary fourth-quarter revenue on an increase in home sales at higher prices.

Rayonier Inc. (RYN), down $5.08 to $28.82

The forest products company reported positive quarterly profit, but restated prior results and will realign its strategy.

Merck & Co. (MRK), down 53 cents to $58.81

The pharmaceutical company won't continue development of a shortened hepatitis C treatment following interim study results.

Nasdaq

Dynavax Technologies Corp. (DVAX), up $14.39 to $15.98

The biotechnology company said an independent board recommended continuing a pivotal study on a potential hepatitis B vaccine.

Orexigen Therapeutics Inc. (OREX), up $1.28 to $5.13

The drug developer reported better-than-expected quarterly profit and revenue on milestone payments associated with Contrave.

Comcast Corp. (CMCSA), down $2.20 to $52.95

The cable television provider's stock slumped after President Obama issued a statement calling for more industry regulations.

Gogo Inc. (GOGO), up $1.77 to $18.41

The in-flight internet service company reported worse-than-expected quarterly profit and reaffirmed its fiscal 2014 outlook.