(For more market insights, including options activity, click on ; for the Day Ahead newsletter link.reuters.com/mex49s; for the Morning News Call newsletter, link.reuters.com/nex49s) U.S. stocks rose on Monday, advancing in a broad rally as merger activity boosted the S&P 500 to an all-time high. The Dow Jones industrial average was up 0.89 percent at 16,247, the S&P 500 was up 0.95 percent at 1,853.63 and the Nasdaq Composite was up 0.93 percent at 4303.11.
** TRIQUINT SEMICONDUCTOR INC, $11.28, +22.21 pct
** RF MICRO DEVICES INC, $6.765, +16.44 pct
Radio frequency chipmaker RF Micro Devices will buy peer TriQuint Semiconductor for about $1.6 billion in an all-stock deal to create a company that could better compete in selling chips to mobile-handset makers.
** TREX CO INC, $82.13, +20.07 pct
The maker of wood and plastic composite products reported a 38 percent jump in fourth-quarter revenue due to higher demand in a recovering U.S. housing market.
** MEN'S WEARHOUSE INC, $48.2, +6.85 pct
** JOS. A. BANK CLOTHIERS INC, $59.465, +8.02 pct
Men's Wearhouse raised its offer for Jos. A. Bank Clothiers by over 10 percent, nearly two weeks after its smaller rival looked to fend off the unsolicited bid by agreeing to acquire Eddie Bauer.
** FACEBOOK, $70.5167, +2.81 pct
WhatsApp, the world's biggest mobile messaging service, is to add a voice call service for its 450 million customers, laying down a new challenge to telecom network operators just days after it was bought by Facebook for $19 billion.
** BLACKBERRY LTD, $9.88, +8.10 pct
The handset maker said it would make its messaging service, BBM, available to Microsoft's Windows Phone and the upcoming Nokia X platforms in the coming months.
** EBAY INC, $56.11, +2.78 pct
Billionaire investor Carl Icahn accused eBay Chief Executive John Donahoe of failing to spot - or ignoring - conflicts of interest on the company's board and called again for the spinoff of its fast-growing PayPal division. Icahn, who also disclosed a 2.15 percent stake in the e-commerce giant on Monday, said in a letter to shareholders that two long-time board members, Marc Andreessen and Scott Cook, had business interests that directly competed with eBay.
** APPLE INC, $526.8, +0.30 pct
A major flaw in Apple software for mobile devices could allow hackers to intercept email and other communications that are meant to be encrypted, the company said on Friday, and experts said Mac computers were even more exposed.
** GT ADVANCED TECHNOLOGIES INC, $13.62, +12.47 pct
The solar and LED equipment maker said it could turn profitable in the second half of this year, after reporting a smaller-than-expected loss for the fourth quarter ended Dec. 31. The company, which will open a manufacturing facility in Arizona to make sapphire materials for Apple Inc's electronics devices, said about 80 percent of its revenue in 2014 will come from the sapphire business, which makes materials used to manufacture LED chips.
** STANDARD MOTOR PRODUCTS INC, $35.56, +10.57 pct
The maker of replacement parts for motor vehicles reported fourth-quarter results that beat analysts' average estimate as sales in its engine management business rose 6.9 percent. The company also announced stock buyback of up to an additional $10 million.
** HUMANA INC, $110.47, +7.44 pct
** UNITEDHEALTH GROUP INC, $75.72, +2.59 pct
** AETNA INC, $71.86, +2.03 pct
** TENET HEALTHCARE CORP, $48.2, +2.84 pct
** WELLCARE HEALTH PLANS INC, $62.94, +3.10 pct
Humana said the U.S. government's proposed cuts to the private Medicare program appear to represent a funding decline of about 3.5 percent to 4 percent, less than the 6 percent to 7 percent it had expected.
** PFIZER INC, $31.85, +1.24 pct
The drug maker said Prevnar 13, its blockbuster vaccine against childhood infections, prevented pneumonia outside of hospitals in people age 65 and older, in one of the largest drug trials ever conducted.
** KANDI TECHNOLOGIES GROUP INC, $14.689, +9.95 pct
The China-based electric vehicle maker told Bloomberg in an interview that it was looking at expanding its car rental service to Beijing and Shanghai. (r.reuters.com/hyd27v)
** SYNTA PHARMACEUTICALS CORP, $7.01, +8.85 pct
The company said two of its cancer compounds demonstrated anti-tumour activity in multiple animal trials.
** PALO ALTO NETWORKS INC, $77.52, +5.30 pct
The security software maker reported second-quarter revenue that beat Wall Street expectations as subscriptions rose. FBN Securities raised its price target on the stock to $90 from $65.
** OCULUS INNOVATIVE SCIENCES INC, $3.73, -6.05 pct
The company said it entered into agreements with two institutional investors for the sale of 450,620 units at a discount to its share closing price on Friday. Oculus said it expected to raise gross proceeds of $1.35 million from the offering.
** AUTOHOME INC,$37.2, +5.17 pct
The Chinese automobile information website reported a 74 percent jump in fourth-quarter revenue due to higher advertising and an increase in the number of paid subscribers.
** ARMSTRONG WORLD INDUSTRIES INC, $56.86, -4.07 pct
The company, which makes floors and ceilings, reported a fourth-quarter profit well below analysts' estimates as costs rose 10.5 percent.
** CANADIAN SOLAR INC, $40.2801, +6.65 pct
The solar company said it would supply 18 megawatts of panels to Japanese electronics maker Hitachi Ltd for a power project. In a separate deal, Canadian Solar said it would supply panels to privately held Strata Solar to power five power projects in North Carolina totaling 30 megawatts
Analysts at JP Morgan Securities began their coverage of Canadian Solar's stock with an "overweight" rating and a price target of $50, citing the company's project pipeline for this year, which could push margins high. Canadian Solar's profit is likely to rise four-fold to $4.31 per share this year on an 87 percent rise in revenue, the analysts wrote in a note to clients.
** ENDOCYTE INC, $15.2167, +1.85 pct
The biopharmaceutical company posted a smaller-than-expected quarterly loss, helped by a 19 percent rise in revenue from its partnership with Merck & Co Inc to develop its cancer drug, vintafolide.
** NOKIA CORP, $7.55, +1.21 pct
** MICROSOFT CORP, $37.83, -0.39 pct
** GOOGLE INC, $1,218.5499, +1.23 pct
The handset maker soon to be acquired by Microsoft is turning to software created by arch-rival Google for a new line of phones it hopes will make it a late contender in the dynamic low-cost smartphone market.
** SINA CORP, $75.74, +3.82 pct
The online media firm has hired Credit Suisse AG and Goldman Sachs for a U.S. initial public offering worth about $500 million of its Sina Weibo microblogging service, a source familiar with the plans said on Monday.
** AU OPTRONICS CORP, $3.31, +4.09 pct
Innolux Corp, the world's No.3 flat-panel maker, declined to rule out a potential merger with smaller rival AU Optronics, but a fund manager said such a potential merger may not be realized soon.
** CHESAPEAKE ENERGY CORP, $27.36, +2.97 pct
The natural gas producer said it was pursuing strategic alternatives for its oilfield services division, including an outright sale or a potential spinoff to Chesapeake shareholders. (Compiled by Shailaja Sharma in Bangalore; Editing by Don Sebastian)