Intercept Pharmaceuticals fell on word that its experimental liver disease drug experienced higher cholesterol levels than those taking a placebo in a clinical trial. It had gained over 550% last week.
Clovis Oncology rose after a Citi analyst, speaking on CNBC's Fast Money on Friday, said the stock could be the next Intercept.
Twitter moved higher after Goldman Sachs raised its target price to reflect accelerating product innovation.
Juniper Networks gained ground after Elliott Management targeted the stock saying it had a plan that would result in a stock price of $35 to $45 a share.
Noodles & Company fell after reporting lower-than-expected revenue guidance.
Scripps Networks Interactive lost ground after the Wall Street Journal reported its merger talks with Discovery Communications broke down.
Express moved lower after the apparel retailer lowered its fourth-quarter forecast.
Dendreon rose after its preliminary fourth-quarter revenues topped street forecasts.
Legg Mason moved a leg up after it estimated third-quarter earnings would come in above analyst expectations.
Darden Restaurants lost ground after activist investor Barington Capital Group said the company's plan to spin off its Red Lobster Chain wasn't enough to enhance shareholder value.
Visa climbed after Citi raised the stock to buy from neutral.
Qihoo 360 Technology moved higher as UBS initiated coverage with a buy rating and a $118 a share price target.
Visteon gained ground on news it was acquiring the electronics business of Johnson Controls for $265 million.
Cracker Barrel Old Country Store fell after reporting comps fell 2.8 percent in November and December.
Aaron's slid after the rent-to-own company warned fourth-quarter results wouldn't match its October downbeat forecast and weak earnings would continue into 2014.
St. Jude Medical advanced after the medical-device maker guided fourth-quarter earnings above street expectations.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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