The Dow Jones industrial average was down 0.77 percent at 15,725.8, the S&P 500 was down 0.52 percent at 1,784.8 and the Nasdaq Composite was down 0.42 percent at 4,105.912.
** ALCOA INC, $11.7, -2.09 pct
Vice President Olivier Jarrault sold 175,031 shares of the largest U.S. aluminum producer at an average price of $10.57, according to a regulatory filing, an 11.5 percent discount to the stock's Thursday close.
** CHEVRON CORP, $112.32, -3.55 pct
The second-largest U.S. oil company said its fourth-quarter profit dropped 32 percent as refining margins and production fell around the world.
** ULTRAGENYX PHARMACEUTICALS INC, $45, +114.29 pct
Shares of the pharmaceutical company, which develops drugs for rare and ultra-rare diseases, more than doubled in its debut after its offering of 5.8 million shares was priced at $21 each, above its expected price range.
** INTERMUNE INC $13.9, -14.46 pct
Wells Fargo analyst Brian Abrahams said a tweet on Friday said that late-stage data from a lung cancer drug of Intermune's competitor Boehringer Ingelheim was available.
"It appears that the competitor data are not yet disclosed, and the reports may have been erroneous," Abrahams wrote in a note and said any weakness caused by the confusion related to the matter was a buying opportunity.
** COMPUTER SCIENCES CORP, $60.77, +10.17 pct
The U.S. technology services provider reported better-than-expected results on Thursday and raised its full-year earnings forecast.
** CONSTANT CONTACT INC, $28.76, -7.38 pct
The online marketer forecast current-quarter results largely below analysts' estimates on Thursday.
** MALIBU BOATS INC $17.52, +25.14 pct
Shares of the company, which manufactures and sells sports boats, rose about 29 percent in its debut after its offering of 7.1 million shares was priced at $14 each.
Deutsche Bank raised its rating on the Canadian paper and pulp products maker's stock to "buy" from "hold," citing better-than-expected demand trends in uncoated free sheet paper.
"As Domtar's mix shifts more towards growth-oriented and lower-volatility businesses, there is a solid argument for a higher valuation multiple," the brokerage said and raised its price target on the stock to $115 from $95.
Domtar has been expanding its personal care business and reducing its exposure to weak pulp prices.
** NATURAL GROCERS BY VITAMIN COTTAGE INC, $37.11, +9.34 pct
The natural and organic groceries retailer on Thursday reported a first-quarter profit that beat the average analysts' estimate, helped by a 10.6 percent rise in comparable store sales and higher gross margins.
** MIDSTATES PETROLEUM COMPANY INC, $4.61, -13.02 pct
Analysts at Morgan Stanley cut their rating on the exploration and production company's stock to "equal weight," according to theflyonthewall.com.
** U.S. SILICA HOLDINGS INC, $29.11, -9.09 pct
The commercial silica maker estimated a fourth-quarter profit that lagged analysts' expectations as severe storms in December hurt well completion and drove up costs. A bad debt from a bankrupt customer also weighed on its results, the company said.
** ATLANTIC POWER CORP, $2.64, -15.66 pct
Analysts at TD Securities downgraded the Canadian power company's stock to "reduce" from "hold," saying Atlantic's recent debt restructuring initiatives could limit its ability to pay dividend. Atlantic Power's wholly owned unit launched up to $600 million in debt offering and said it plans to use the proceeds to fund its working capital needs, the company said on Thursday.
** GOOGLE INC, $1,180.44, +3.97 pct
The Internet giant's quarterly revenue beat Wall Street's target despite an ongoing decline in prices for its online ads and deepening losses at Motorola, the handset-making division to be sold to China's Lenovo.
** AMAZON.COM INC, $364.485, -9.56 pct
The online retailer warned of a possible loss in the current quarter and its quarterly results missed expectations in the holiday shopping season. At least seven brokerages cut their price targets on the stock, by as much as $30 to a low of $415.
** TYSON FOODS INC, $37.98, +10.12 pct
The largest U.S. meat processor reported first-quarter profits that grew more than Wall Street expected, helped by higher chicken and beef sales.
** ABBVIE INC, $49.53, +2.53 pct
** ENANTA PHARMACEUTICALS INC, $36.7999, +14.04 pct
Abbvie issued a cautious 2014 profit forecast, but said it expects U.S. approval this year for its potentially lucrative new all-oral treatment for hepatitis C. Enanta is developing these treatments with the company.
** INTRAWEST RESORTS HOLDINGS INC, $11.71, -2.42 pct
Shares of the mountain resort operator owned by private equity firm Fortress Investment Group LLC, fell as much as 8 percent in their debut, valuing the company at about $496 million.
** MASTERCARD INC, $75.47, -5.38 pct
The world's No.2 credit and debit card company reported a 3 percent rise in quarterly profit but missed analysts' average forecast as expenses rose.
** ACCURAY INC, $10.47, +13.31 pct
The maker of cancer radiation devices reported a smaller-than-expected quarterly loss, helped by revenue growth and strong margins, and raised its 2014 revenue forecast.
** HANGER INC, $33.85, -13.41 pct
The orthotic and prosthetic products provider estimated full-year earnings significantly below analysts' average expectations due to operational issues at one of its units.
Brokerage Noble Financial cut its price target on the company's stock to $38 from $40.
** PACCAR INC, $55.87, -2.75 pct
The company, which makes vehicles sold under the Kenworth, Peterbilt and DAF brand names, reported higher quarterly profit on Friday as the maker of commercial trucks and engines benefited from recovering demand in Europe.
** SOLAZYME INC, $11.7, +19.75 pct
The renewable oil producer said on Thursday that commerical operations had begun at both Archer Daniels Midland Co's facility in Clinton, Iowa, and at another facility in Galva, Iowa, operated by American Natural Products. Oil products - used in lubricants, metalworking, home and personal care - made at the facilities by the three companies, are being sold in the United States and Brazil, Solazyme said.
** WYNN RESORTS LTD, $215.89, +7.14 pct
The casino operator on Thursday reported fourth-quarter results that beat analysts' estimates, driven by growth in revenue from its Macau and Las Vegas operations.
At least four brokerages raised their price targets on the company's stock on Friday.
** GREEN DOT CORP, $22.55, -15.64 pct
The prepaid debit card company reported a weaker-than-expected quarterly profit as it incurred higher operating expenses.
Brokerage SunTrust Robinson reduced its price target on the company's stock to $22 from $25, but maintained its "neutral" rating. Green Dot forecast full-year revenue in the range of $640-$650 million, well above the average analyst estimate of $631.6 million, according to Thomson Reuters I/B/E/S.
** CEPHEID INC, $53.183, +12.51 pct
The company reported a smaller-than-expected loss in the fourth quarter, helped by higher sales of its molecular diagnostics systems and reagents.
At least seven brokerages, including UBS, Citigroup and Canaccord Genuity raised their price targets on the company's stock.
** MATTEL INC, $38.1601, -11.28 pct
** HASBRO INC, $48.68, -4.25 pct
Mattel, the world's largest toy company, missed Wall Street's profit and sales estimates for the fourth quarter on weak demand in the United States during the all-important holiday selling season.
Rival Hasbro's stock also fell on the results.
** COOPER TIRE & RUBBER CO, $23.38, +2.36 pct
The company said it could sell its 65 percent stake in its Chinese joint venture to partner Chengshan Group Co Ltd, clearing the way for the U.S. tire maker to look for a buyer for itself.
** CYTRX CORP, $7.211, -9.64 pct
The drug developer priced a public offering of 11.5 million shares of its common stock at $6.50 each, a discount of 19 percent to its Thursday close. The company plans to use the net proceeds of the offering to fund trials of its cancer drug, aldoxorubicin, and for general corporate purposes.
DFC GLOBAL CORP, $7.79, -26.30 pct
The pawn and payday lender reported a weaker-than-expected quarterly profit as it earned lower fees from its consumer lending and pawn businesses, promoting several brokerages to lower their price targets on the company's stock. Nomura downgraded the company's stock to "buy" from "neutral."
** MEDLEY CAPITAL CORP, $13.72, -4.32 pct
The business development finance company started a public offering of 6 million shares of its common stock at $14 each, below its Thursday close of $14.34. The company plans to use the proceeds from the offering for debt repayment, for investment and general corporate purposes.
** AUTOLIV, $90.17, +2.14 pct
The auto safety equipment maker reported a bigger-than-expected rise in fourth-quarter earnings and forecast continued sales growth this year, albeit at a slower pace than in 2013.
** ZYNGA INC, $4.235, +18.96 pct
** GLU MOBILE INC, $3.9799, +6.13 pct
Zynga will shed 15 percent of its workforce to slash costs and buy mobile game developer NaturalMotion for $527 million to refresh a stalled games pipeline.
Shares of mobile game developer Glu also rose on the news.
** CHIPOTLE MEXICAN GRILL INC, $559.57, +13.28 pct
The burrito chain said on Thursday an increase in customer visits contributed to bigger-than-expected growth in quarterly sales at established restaurants.