Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
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Ocwen Financial Corp., down $5.89 to $16.01
The subprime mortgage servicer's executive chairman will resign in a settlement that also provides $150 million to homeowners.
Nabors Industries Ltd., down 53 cents to $13.10
The oil drilling services company's stock fell as the price of oil continued its monthslong decline on prolonged weak demand.
Enanta Pharmaceuticals Inc., up $4.70 to $51.32
The biotechnology company's development partner AbbVie Inc. received FDA approval for the Viekira Pak hepatitis C treatment.
Gilead Sciences Inc., down $15.55 to $92.90
Viekira Pak, a competitor to Gilead's hepatitis C treatments Sovaldi and Harvoni, was named the preferred treatment by the nation's largest pharmacy benefits manager.
Achillion Pharmaceuticals Inc., up $1.28 to $15.49
The biotechnology company reported positive results from two studies focusing on a treatment regimen for hepatitis C patients.
Caesar's Entertainment Corp., up $1.51 to $15
The casino operator will buy an affiliate in an all-stock deal, giving shareholders a 62 percent stake in the combined company.
Blackberry Ltd., up 69 cents to $10.68
The company is working with Boeing Co. to develop a smartphone with high-tech security features aimed at government agencies.
Taser International Inc., up $2.08 to $26.06
The stun gun and body camera maker reported nearly 1,900 orders received and expected to ship during the fourth quarter.