BUZZ-U.S. STOCKS ON THE MOVE-Coca-Cola, Starwood, Amkor Tech

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U.S. stocks climbed on Tuesday after two straight declining sessions, with index futures jumping after a report of a proposal for a 6-month debt extension for Greece as negotiations continued. Dow Jones industrial average e-mini futures were up 0.50 percent at 17,770, S&P 500 futures were up 0.51 percent at 2,053 and Nasdaq 100 futures were up 0.53 percent at 4,236.75.

** COCA-COLA CO, Monday close $41.23, +3.81 pct premarket

The world's largest beverage maker reported a better-than-expected profit as sales in North America, its biggest market, rose for the first time in four quarters, offsetting the impact of a stronger dollar on its overseas business.

** STARWOOD HOTELS & RESORTS WORLDWIDE INC (NYSE: HOT - news) , Monday close $71.23, +5.01 pct premarket

The hotel operator reported an 83 percent jump in quarterly profit and said it would spin off its vacation ownership business.

** CVS HEALTH CORP, Monday close $99.56, +1.85 pct premarket

The No. 2 U.S. drugstore operator reported a near 13 percent rise in quarterly net revenue, helped by an increase in pharmacy same-store sales.

** AMKOR TECHNOLOGY INC (NasdaqGS: AMKR - news) , Monday close $7.05, +19.72 pct premarket

The semiconductor assembling and testing services provider's fourth-quarter revenue and profit beat the average analyst estimate as demand for flip chip, wafer-level processing and other test services grew.

** CAMTEK LTD (NasdaqGM: CAMT - news) , Monday close $3.19, -5.96 pct premarket

Chip inspection equipment maker Rudolph Technologies Inc (NYSE: RTEC - news) said a U.S. court ruled against Camtek in a patent infringement case.

** REGENERON PHARMACEUTICALS INC (NasdaqGS: REGN - news) , Monday close $399.72, +0.82 pct premarket

The company reported better-than-expected fourth-quarter sales, driven by surging demand for its blockbuster eye drug Eylea. U.S. sales of the injectable drug rose about 29 percent to $518 million.

** RETAILMENOT INC (NasdaqGS: SALE - news) , Monday close $15.47, -6.27 pct premarket

The online coupon company forecast revenue for first quarter and full year below analysts' estimates.

** BIOCEPT INC (NasdaqCM: BIOC - news) , Monday close $1.85, -34.59 pct premarket

The cancer test maker is offering 8 million shares of common stock and warrants to buy up to another 8 million shares at a combined price of $1.25, a discount of 32 percent to the stock's Monday close.

** TRANSOCEAN LTD (NYSE: RIG - news) , Monday close $20.44, -3.23 pct premarket

Analysts at Credit Suisse (NYSE: CS - news) cut their rating on the stock to "underperform" from "neutral", saying they expect the company to stack a lot of rigs over the next two years.

** URBAN OUTFITTERS INC (NasdaqGS: URBN - news) , Monday close $36.51

** AEROPOSTALE INC, Monday close $2.64, +17.05 pct premarket

The U.S. apparel retailers reported better-than-expected quarterly sales after holiday sales in the United States rose the most since 2011.

** QUALCOMM INC, Monday close $67.11, +2.52 pct premarket

Even after agreeing to pay a record near-$1 billion fine in China for antitrust violations, the U.S. chipmaker faces big challenges in its most important market.

As low-cost, low-margin Chinese smartphone manufacturers push into other developing markets, they are driving down average handset prices - bad news for San Diego-based Qualcomm (Hanover: QCI.HA - news) , which collects royalties based on the handset's value.

** ALLISON TRANSMISSION HOLDINGS INC, Monday close $32.5, -7.69 pct premarket

The vehicle transmission system maker said it expected 2015 sales to be flat or fall by up to 5 percent due to a "heightened level of uncertainty and the lack of near-term visibility and confidence in the global off-highway end markets".

** COUPONS.COM INC, Monday close $14.51, -30.39 pct premarket

The online deal coupon provider forecast first-quarter revenue of $52 million-$54 million, below the average analyst estimate of $66.3 million.

** GILEAD SCIENCES INC (NasdaqGS: GILD - news) , Monday close $96.9, +0.93 pct premarket

Global health charity Medecins du Monde (MdM) launched a legal challenge on Tuesday to a European patent held by the U.S. drugmaker which it accused of charging "exorbitant" prices for a hepatitis C drug.

** PFIZER INC (NYSE: PFE - news) , Monday close $33.07, +0.70 pct premarket

The drugmaker said it entered into an agreement with Goldman, Sachs & Co to buy back $5 billion of its stock. Under the agreement, which forms a part of Pfizer's existing buyback authorization, about 150 million shares will be bought.

** ACHILLION PHARMACEUTICALS INC (NasdaqGS: ACHN - news) , Monday close $11.66, +3.77 pct premarket

The company's experimental hepatitis C drug, when used with Gilead Sciences Inc's Sovaldi, eradicated signs of the virus in six weeks, the shortest duration and highest response achieved by any two-drug treatment.

** TESCO CORP, Monday close $11.9

Britain's biggest supermarket returned to sales growth for the first time since January 2014, industry data showed on Tuesday, indicating measures introduced by new boss Dave Lewis are having a positive impact.

** CANON INC (Other OTC: CAJFF - news) , Monday close $31.33

Canon plans to buy network video surveillance leader Axis AB for about 23.6 billion Swedish crowns ($2.83 billion), the biggest purchase ever for the Japanese company that is trying to expand beyond the shrinking camera market.

** COMPUTER SCIENCES CORP, Monday close $64.84

The information technology services company's third-quarter revenue missed the average analyst estimate as revenue from two of three segments fell, while that of the largest increased only 0.8 percent.

** MICROSOFT CORP, Monday close $42.36, +0.80 pct premarket

Microsoft (NasdaqGS: MSFT - news) took a leaf out of Apple (NasdaqGS: AAPL - news) 's playbook on Monday and issued a US$10.75bn bond issue - the biggest so far this year - in part to return money to its shareholders.

Microsoft and Samsung Electronics Co Ltd have settled a contract dispute over patent royalties, though terms of the settlement are confidential, Microsoft said in a statement on Monday.

** FACEBOOK INC (NasdaqGS: FB - news) , Monday close $74.44, +0.62 pct premarket

Facebook has tied up with India's Reliance Communications (BSE: RCOM.BO - news) Ltd to offer free access to a handful of online services in India, broadening its campaign to boost Internet use in the developing world.

** INTERNATIONAL BUSINESS MACHINES CORP, Monday close $155.75, +0.33 pct premarket

** PRICELINE GROUP INC, Monday close $1,033.15, +0.66 pct premarket

IBM (NYSE: IBM - news) filed a lawsuit against Priceline on Monday, accusing it of infringing four IBM patents in running its travel and dining websites.

** RIO TINTO PLC (LSE: RIO.L - news) , Monday close $47, -2.21 pct premarket

Rio Tinto (Xetra: 855018 - news) is expected to star among the top five global miners with a return of billions of dollars to shareholders at its annual results, even as the firm is set to report its worst half-year profit since 2009.

** ROYAL DUTCH SHELL PLC (Xetra: R6C1.DE - news) , Monday close $66.72, -0.97 pct premarket

Royal Dutch Shell and the United Steelworkers union (USW) will resume negotiations on Tuesday over a new labor contract for U.S. refinery workers, the company said on Monday as the walkouts stretched into their ninth day.

** SANDRIDGE ENERGY INC (NYSE: SD - news) , Monday close $1.96

The U.S. oil and gas producer plans to slash its rig count in Oklahoma and Kansas by nearly 75 percent, according to a document obtained by Reuters. (Compiled by Amrutha Penumudi in Bengaluru; Editing by Simon Jennings)