MARKET PULSE-AIG, Nu SKin, Hanger, Twitter, Office Depot, Fluidigm

(For more market insights, including options activity, click on ; for the Day Ahead newsletter http://link.reuters.com/mex49s; for the Morning News Call newsletter, http://link.reuters.com/nex49s) U.S. stocks fell on Tuesday as AIG weighed on financial shares after disappointing earnings and a slide in Twitter (NYSE: TWTR - news) took down other names in the technology and internet spaces. The Dow Jones industrial average was down 0.66 percent at 16,422.15, the S&P 500 was down 0.74 percent at 1,870.62 and the Nasdaq Composite dropped 47.18 points or 1.14 percent, to 4,090.875.

** AMERICAN INTERNATIONAL GROUP INC, $50.84, -3.57 pct

The company posted a 27 percent fall in quarterly income, hurt by a drop in earnings from premiums and higher disaster losses in its core property and casualty insurance business.

** NU SKIN ENTERPRISES INC (NYSE: NUS - news) , $82.14, -6.21 pct

The skincare products maker estimated second-quarter results below the average analyst estimate, hurt by lower contribution from its China operations that were halted until recently.

Nu Skin had recently said it was difficult to gauge how the China business would perform on recommencement. It had to suspend promotional meetings in the country after regulators launched a probe in January.

** HANGER INC (NYSE: HGR - news) $30.52, -9.22 pct

The orthotic and prosthetic products distributor's first-quarter results missed analysts' estimates, hurt by the impact of a severe winter in eastern and central United States.

The company also reduced its forecast for full-year adjusted profit and net sales.

** TWITTER INC, $32.41, -16.36 pct

Shares of the social media company fell after the expiration of a six-month "lock-up" period that had restricted the sale of about 470 million shares, or roughly 82 percent of the company's outstanding equity.

** OFFICE DEPOT INC (NYSE: ODP - news) , $4.89, +17.27 pct

Office Depot raised its forecast for full-year adjusted operating income and said it would close at least 400 stores in the United States over two years. The company also reported better-than-expected quarterly results due to cost-cutting.

** FOREST OIL CORP, $2.08, +16.20 pct

Sabine Oil & Gas LLC said it would buy Forest Oil (Frankfurt: FOL.F - news) , which is valued at about $213 million, in an all-stock deal. Upon completion of the deal, Sabine unit holders will own about 73.5 percent of a new combined entity and Forest shareholders will own about 26.5 percent.

** INTERACTIVE INTELLIGENCE GROUP INC, $50.46, -18.74 pct

The telecom software maker reported first-quarter earnings below analysts' average expectations.

Brokerage Wedbush cut its price target on the stock to $60 from $80 while maintaining its "neutral" rating

** ATHENAHEALTH INC (NasdaqGS: ATHN - news) $108.8801, -14.12 pct

Hedge fund manager David Einhorn said on Monday that athenahealth is one of the companies in which his firm, Greenlight Capital, has taken a short position.

** ADVANCED ENERGY INDUSTRIES INC, $17.11, -20.01 pct

The power company reported a lower-than-expected first-quarter profit on Monday due to soft demand. The company also forecast a decline in second-quarter orders due to low bookings by customers of original equipment manufacturers.

** FLUIDIGM CORP $33.11, -15.21 pct

The biotechnology tools and tests maker reported a bigger-than-expected loss for the first quarter on higher expenses.

Analysts at Leerink Partners cut their price target on the company's stock to $48 from $52.

** TABLEAU SOFTWARE INC (NYSE: DATA - news) , $57.7, -0.50 pct

** DATAWATCH CORP, $13.41, +2.92 pct

The company reported a much smaller-than-expected quarterly loss as the data analysis software maker added 1,800 new customers.

Smaller rival Datawatch (Frankfurt: DA7.F - news) 's shares were also up.

** MERCK (Dusseldorf: 6MK.DU - news) & CO INC, $57.18, -2.47 pct

Germany's Bayer AG (Milan: BAY.MI - news) has trumped rival bidders for Merck (Other OTC: MKGAF - news) 's consumer care business in a $14.2 billion deal, adding to a string of major cross-border deals in the healthcare industry.

** LIBERTY INTERACTIVE CORP, $28.74, -0.27 pct

** TRIPADVISOR INC (NasdaqGS: TRIP - news) , $80.98, -4.40 pct

John Malone's Liberty Interactive filed with regulators to spin off its stake in travel website TripAdvisor and ownership of online retailer BuySeasons into a separate company valued at about $3 billion.

** APPLE INC (NasdaqGS: AAPL - news) , $595.85, -0.85 pct

A U.S. jury on Monday left the total damages Samsung Electronics Co Ltd must pay Apple unchanged at $119.6 million, after additional deliberations in a trial where the South Korean smartphone maker was found to have infringed three Apple patents.

Separately, the company granted its new retail chief 113,334 restricted stock units, the company said in a regulatory filing on Monday, valued at $68.1 million based on Monday's closing share price.

** FABRINET (NYSE: FN - news) , $18.7, -15.23 pct

The maker of precision optical devices forecast a weak current quarter.

Needham analysts downgraded the stock to "hold" from "buy" and said the company might be losing market share in its data communication business.

** BARCLAYS PLC (LSE: BARC.L - news) , $16.6, -3.94 pct

The company said a collapse in investment bank revenue hit first quarter profits and was still hurting income in April as the British bank works on an overhaul of the flagging business, expected to be announced later this week.

** TARGET CORP (NYSE: TGT - news) , $57.75, -3.54 pct

The company's decision to oust Gregg Steinhafel as chairman and chief executive some five months after a massive data breach has triggered concerns the No. 3 U.S. retailer might have even more bad news for investors.

** MOSAIC CO, $48.42, -2.60 pct

The U.S. fertilizer company reported a 43 percent plunge in quarterly profit on Tuesday as prices of phosphate and potash dropped.

** VIVUS INC (NasdaqGS: VVUS - news) , $5.6001, +7.90 pct

The drugmaker reported a smaller-than-expected loss in the first quarter, helped mainly by lower operating expenses and higher sales of its obesity treatment.

** CORINTHIAN COLLEGES INC (NasdaqGS: COCO - news) , $1.055, -11.34 pct

** EDUCATION MANAGEMENT CORP, $2.4999, -10.08 pct

The company said it would explore strategic alternatives as student enrollments decline and the company faces potential legal action from U.S. regulators.

** HILLSHIRE BRANDS CO, $36.5, +3.40 pct

The company reported better-than-expected quarterly results, helped by strong sales of its Jimmy Dean products including breakfast sandwiches.

** QUALYS INC (NasdaqGS: QLYS - news) , $20.73, +8.48 pct

The company, which provides cloud computing security software, reported better-than-expected first-quarter results on Monday, helped by new subscriptions and renewal of old subscriptions.

** PEREGRINE SEMICONDUCTOR CORP, $5.5, +3.40 pct

The radio frequency chipmaker reported better-than-expected first-quarter revenue on Monday, helped by higher demand. At least two brokerages raised their price target on the company's stock on Tuesday.

** DIRECTV (Frankfurt: DIG1.F - news) , $81.95, +2.64 pct

The No.1 U.S. satellite TV provider reported a better-than-expected quarterly profit as average revenue per user rose in the United States.

** EOG RESOURCES INC (NYSE: EOG - news) , $103.08, +3.86 pct

The oil and gas company reported a quarterly profit that topped Wall Street expectations on Monday, as the company pumped higher volumes of crude from shale fields in Texas and North Dakota.

Citigroup (NYSE: C - news) , Goldman Sachs (NYSE: GS-PB - news) , UBS (Xetra: UB0BL6 - news) and Morgan Stanley (Berlin: DWD.BE - news) raised their price target on the company's stock.

** ANADARKO PETROLEUM CORP, $102.52, +3.05 pct

** TRONOX LTD, $24.73, -0.28 pct

Oil and gas explorer Anadarko said it expected to close Tronox litigation in the third or the fourth quarter.

Anadarko reported a big first-quarter loss late on Monday, compared with a year-earlier profit, as a previously announced $5.15 billion settlement related to the litigation hurt results.

** NAUTILUS INC (NYSE: NLS - news) , $9.86, +11.29 pct

The sports-equipment maker reported much better-than-expected quarterly results on Monday as sales rose 21 percent, driven by cardio products such as the Bowflex TreadClimber and MAX Trainer.

** LEAPFROG ENTERPRISES INC (NYSE: LF - news) , $7.285, +6.66 pct

The children (NasdaqGS: PLCE - news) 's tablet maker on Monday posted a smaller-than-expected first-quarter loss. The company, which also reported revenue above analysts' average estimate, reaffirmed its full-year outlook.

** HYPERDYNAMICS CORP, $3.97, -10.99 pct

The oil and gas company's stock fell on Tuesday, a day after it rose as much as 199 percent. The stock soared on Monday after the company said its project partner Tullow Oil (LSE: TLW.L - news) had lifted the force majeure declared on its offshore exploration block in Guinea.

** SYPRIS SOLUTIONS INC (NasdaqGM: SYPR - news) , $3.375, +14.41 pct

The company reported a first-quarter profit, compared with a loss in the year-ago quarter, helped by increased sales in both its industrial and electronics businesses.

The industrial business makes train components, while the electronics business provides digital and analog data systems and encryption devices primarily used in military applications.

** AVAGO TECHNOLOGIES LTD, $66.98, +4.25 pct

The chipmaker said it would replace LSI Corp in the S&P 500 after the close of trading on Wednesday, following the expected closure of its deal to buy LSI (Berlin: LOG.BE - news) on Tuesday.

** SWIFT ENERGY CO (NYSE: SFY - news) , $11.97, +9.42 pct

The oil and gas producer raised its full-year capital expenditure budget to $350-$400 million from $300-$350 million. The raise comes after the company said it expected to receive $175 million on closing of its joint venture with PT Saka Energi Indonesia, a unit of PT Perusahaan Gas Negara.

Swift also said it expanded a long-term deal for natural gas gathering services in Webb County, Texas with Howard Energy Partners (Other OTC: PGPHF - news) .

** JINKOSOLAR HOLDING CO LTD, $27.75, +1.43 pct

The Chinese solar company reaffirmed its forecast for the first quarter and the full year. The company said it expects solar module shipments of 440-470 megawatts (MW) for the quarter and 2.3-2.5 gigawatts for the year.

** ROSETTA RESOURCES INC (NasdaqGS: ROSE - news) , $45.62, -3.69 pct

BMO Capital Markets and Topeka Capital Markets lowered their price target on the oil and gas producer's stock, citing higher costs and lower-than-expected production in the first quarter ended March 31.

Topeka Capital lowered its price target on the stock to $62 from $66, while BMO lowered its price target to $46 from $52.

** SOLAZYME INC (NasdaqGS: SZYM - news) , $10.45, -3.78 pct

The renewable oil and bioproducts producer reported a bigger-than-expected first-quarter loss as expenses rose 49 percent.

** CYNOSURE INC (NasdaqGS: CYNO - news) , $22.772, -10.35 pct

The laser aesthetic device maker posted lower-than-expected quarterly results on weak sales of its laser products in North America and higher operating expenses.

** TREE.COM INC, $24.7601, -14.91 pct

The operator of LendingTree.com, which lists home loan offers, widened its first-quarter loss per share from continuing operations to 52 cents from 2 cents a year earlier, due to a surge in expenses.

The company said it expects its second-quarter core earnings to be in the range of $4.5 million to $5 million, below analysts' average estimate of $5.5 million, according to Thomson Reuters I/B/E/S.

** OASIS PETROLEUM INC (NYSE: OAS - news) , $47.62, +1.82 pct

The oil and gas producer, which operates in North Dakota's oil-rich Bakken shale field, posted a better-than-expected first-quarter profit as production rose.

Analysts at Topeka Capital Markets raised their price target on the stock to $56 from $52.

** SAGENT PHARMACEUTICALS INC (NasdaqGS: SGNT - news) , $21.69, +9.38 pct

The specialty pharmaceutical company reported better-than-expected revenue for the first quarter, helped by strong sales of products it launched in the previous year.

The company said it expects net revenue for fiscal 2014 in the range of $250-$290 million, driven by 10 to 15 product launches.

** WELLCARE HEALTH PLANS INC (NYSE: WCG - news) ,$67.7, +2.64 pct

The managed care services provider reported better-than-expected results for the first quarter, helped by growth in its Medicaid health plans business and gains from its acquisition of Medicare plans provider Windsor Health Group.

Wellcare also raised its 2014 forecast for adjusted net income and premium revenue, saying that it expected growth in its Medicaid Health Plans and Medicare Prescription Drug Plans businesses.

** BILL BARRETT CORP (NYSE: BBG - news) , $26.19, +5.78 pct

Analysts at Mizuho Securities USA raised their rating on the oil and gas producer's stock to "buy" from "neutral", citing anticipated increases in production and lower costs for the remainder of the year.

The analysts also raised their price target on the stock to $29 from $27.

** QUICKSILVER RESOURCES INC (NYSE: KWK - news) , $2.785, -14.04 pct

The oil and gas producer reported a bigger-than-expected loss for the first quarter.

Production volumes in the quarter fell to 22.1 billions of cubic feet equivalent (bcfe) from 32.2 bcfe a year earlier.

** NN INC (NasdaqGS: NNBR - news) , $21.05, +8.84 pct

The company, which supplies high precision metal bearing components and industrial plastic and rubber products, reported a 9.3 percent jump in quarterly revenue, helped by increased demand for its products in China and Europe.

** HERTZ GLOBAL HOLDINGS INC, $28.33, -3.64 pct

The car rental company postponed its first-quarter results announcement to an unspecified date. Hertz was originally scheduled to report results on May 7.

** GREAT LAKES DREDGE & DOCK CORP, $7.805, -9.14 pct

The company, which provides dredging services, reported a bigger-than-expected loss as extreme winter weather in January and February resulted in longer project durations and equipment downtime for maintenance.

Great Lakes also said its margins contracted due to minimal dredging activity in the Middle East.

** MOMENTA PHARMACEUTICALS INC (NasdaqGS: MNTA - news) , $10.44, -7.61 pct

The company said its operations could be affected by the U.S. Supreme Court's decision to review a federal circuit court ruling in favor of two teams of companies developing a generic version of Teva Pharmaceuticals Industries Ltd's drug, Copaxone.

Momenta said it established an at-the-market equity facility to sell up to $75 million of its common stock to fund its drug development programs during the time potential cash flow from its generic version of Copaxone remained uncertain.

"The (Supreme Court) review mostly pushes out the timeline of a generic Copaxone launch," RF Lafferty & Co analyst Difei Yang said.

"Momenta can launch while the Supreme Court is reviewing the case, that's called an at risk launch. In the case that Momenta lost the Supreme court case, it might owe Teva treble damages."

** APPLIANCE RECYCLING CENTERS OF AMERICA INC (NasdaqCM: ARCI - news) , $3.72, +29.12 pct

The company, which provides turnkey appliance recycling and replacement services for electric utilities, reported a 10 percent jump in quarterly revenue, helped by increased recycling division appliance replacement sales.

** TOWERS WATSON & CO (NYSE: TW - news) , $103.72, -7.32 pct

The company, which provides human resources, risk and financial management services, forecast lower-than-expected full-year revenue of $3.45 billion due to a fall in projects in the EMEA and Asia Pacific regions.

Analysts on average were expecting $3.50 billion, according to Thomson Reuters I/B/E/S.

The company reported revenue of $905 million for the quarter ended March 31, lower than the average analyst estimate of $918.4 million.

** SP BANCORP INC (NasdaqCM: SPBC - news) , $28.6, +39.51 pct

Green Bancorp Inc said on Monday it would acquire SP Bancorp, the holding company of SharePlus Bank, for $46.2 million in cash, or $29.55 per share.

** BOFI HOLDING INC (NasdaqGS: BOFI - news) , $82.51, +2.80 pct

The bank holding company's third-quarter results beat Wall Street estimates as its net interest income rose about 36 percent to $35.66 million from a year earlier.

** MINDRAY MEDICAL INTERNATIONAL LTD, $31.53, -6.36 pct

The medical device maker on Monday reported first-quarter revenue of $264.8 million, below analysts' average estimate of $292.50 million.

"The revenue miss was a function of still slowing growth in China, while margins deteriorated 300 (basis points) on the heels of the 2-3 year investment cycle announced last quarter," Jefferies analysts wrote in a note to clients.

** MURPHY USA INC (NYSE: MUSA - news) , $43.76, -2.71 pct

The marketer of retail motor fuel products reported first-quarter results that missed analysts' average estimate due to lower retail fuel margins.

** LIVEDEAL INC (NasdaqCM: LIVE - news) , $4.61, +2.22 pct

The internet marketing company said it acquired DealTicker, an online platform which offers products and services at "substantial discounts" in the United States and Canada.

The deal, which is expected to add a significant percentage of growth in revenue for LiveDeal, "marks an expansion of LiveDeal's successful restaurant deal engine into the retail industry," the company said.

** CARMIKE CINEMAS INC (NasdaqGS: CKEC - news) , $33.14, +10.91 pct

The movie theater group reported better-than-expected first-quarter revenue on Monday, helped by growth in audience and per screen admission revenue.

At least three brokerages raised their price targets on the stock on Tuesday.

** DEX MEDIA INC (NasdaqGS: DXM - news) , $9.48, +23.92 pct

The social and mobile marketing company reported a 58 percent rise in quarterly revenue on Tuesday, helped by higher sales of digital advertising, and the company said it paid down $74 million of bank debt.

** INTEGRATED DEVICE TECHNOLOGY INC (NasdaqGS: IDTI - news) , $12.35, +4.13 pct

The chip-component maker reported better-than-expected fourth-quarter results on Monday, helped by higher sales in its communications business as telecom carriers speed up roll out of 4G LTE networks.

** RETAILMENOT INC (NasdaqGS: SALE - news) , $30.25, -7.52 pct

The online coupon company reported lower-than-expected first-quarter results on Monday as operating expenses rose 77 percent.

** MTS SYSTEMS CORP, $64.06, -5.04 pct

The company, which makes testing systems for the auto and aviation industries, reported lower-than-expected second-quarter results, hurt by a 3 percent decline in revenue from its larger test business.

** NATIONAL CINEMEDIA INC (NasdaqGS: NCMI - news) , $14.905, -2.52 pct

The company, which sells in-theater and online advertisements in North America, reported a better-than-expected quarterly profit on Monday.

Separately, the U.S.-based company said it agreed to buy rival Screenvision in a $375 million cash-and-stock deal to expand its video advertising network to about 3,900 theaters across 50 states.

** RESOLUTE FOREST PRODUCTS INC (NYSE: RFP - news) , $15.75, -1.19 pct

The newsprint producer said on Tuesday it would permanently close its previously idled pulp and paper mill in Fort Frances in Ontario. The kraft pulp mill has been idled since November 2012.

** QUANTUM FUEL SYSTEMS TECHNOLOGIES WORLDWIDE INC (NasdaqCM: QTWW - news) , $3.44, -45.57 pct

The clean propulsion systems maker's largest customer, Agility Fuel Systems, said it was setting up a joint venture with Quantum's competitor, Hexagon Lincoln, to build cylinders. An Agility spokesman confirmed that this would transfer some of its business with Quantum to the joint venture, Agility Hexagon LLC. (http://r.reuters.com/hub29v)

** CRITEO SA (NasdaqGS: CRTO - news) , $28.76, -7.85 pct

The digital advertising company on Tuesday reported a quarterly profit that missed analysts' average estimate as operating expenses rose sharply.

** VRINGO INC (NasdaqCM: VRNG - news) , $3.67, -10.05 pct

Google Inc (NasdaqGS: GOOG - news) asked a U.S. appeals court to throw out a $30.5 million patent-infringement verdict won by the licensing company in 2012, Bloomberg reported. (http://link.reuters.com/nub29v)

** YELP INC (NYSE: YELP - news) , $52.85, -12.19 pct

A Wall Street regulator fined a Morgan Stanley wealth management unit $5 million on Tuesday for supervisory failures related to the sale of shares to retail customers in 83 initial public offerings, including Facebook Inc (NasdaqGS: FB - news) and Yelp Inc .

** AMYRIS INC (NasdaqGS: AMRS - news) , $3.21, -8.55 pct

Website Street Sweeper released a report on the renewable chemicals and fuels company, in which it raised concerns about the company's piled-up debt and instances of alleged insider selling. (http://r.reuters.com/kub29v) (Compiled by Natalie Grover; Edited by Maju Samuel and Joyjeet Das (Shenzhen: 002421.SZ - news) )