(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. stock index futures fell on Monday on concern China's economy continued to lose momentum and as pro-Russian separatists ambushed Ukrainian forces, escalating a conflict that has kept global markets on tenterhooks recently. Dow Jones industrial average futures were down 0.56 percent at 16,355, S&P 500 futures were down 0.50 percent at 1,865 and Nasdaq 100 futures were down 0.71 percent at 3,554.
** HYPERDYNAMICS CORP, Friday close $1.49, +42.28 pct premarket
The oil and gas company said its project partner Tullow Oil had lifted the force majeure declared on its offshore exploration block in Guinea.
Hyperdynamics said it was trying to satisfy the conditions necessary to resume production, including a clarification that a U.S. regulatory investigation of the company would not hurt Tullow's operations under the production sharing contract.
** APPLE INC, Friday close $592.58, -0.45 pct premarket
A U.S. jury on Friday ordered Samsung Electronics Co Ltd to pay $119.6 million to Apple, far less than Apple had sought and marking a big loss for the iPhone maker in the latest round of their globe-spanning mobile patent litigation.
** TWITTER INC, Friday close $39.02, -1.59 pct premarket
The six-month "lockup" - the period after the initial public offering during which early investors are barred from selling their shares - ends on Monday. Restrictions on about 470 million shares will be removed. The expiration of the lockup period could put additional pressure on the stock.
According to an article in the May 5 edition of Barron's, Twitter still looks overpriced even after a 47 percent drop from its late December high of $74.
** PFIZER INC, Friday close $30.75, -1.69 pct premarket
The company reported revenue well below Wall Street expectations on falling sales of generic medicines, underscoring its interest in pursuing a $106 billion bid for rival AstraZeneca to promote new business growth.
** JPMORGAN CHASE & CO <JPM.N, Friday close $55.58, -3.04 pct premarket
The investment bank expects second-quarter revenue from bond and equity trading to decline by about 20 percent from a year earlier, the biggest U.S. bank by assets said on Friday.
Citigroup and Morgan Stanley cut their price target on the company's stock.
** B/E AEROSPACE, Friday close $88.96, +9.39 pct premarket
The company, a $9 billion maker of aircraft cabin interior products, said on Sunday it was exploring strategic alternatives including a possible sale, merger or spin off of the company or selected businesses.
German aircraft seating maker Recaro is looking into the news, an executive said on Monday.
** NORDION INC, Friday close +6.82, +6.82 pct premarket
Sterigenics, a sterilization services provider owned by private equity firm GTCR LLC, raised its buyout offer for Nordion to $758 million from $727 million on Monday, after the Canadian medical isotope supplier received a rival bid from an unnamed buyer.
** TYSON FOODS INC, Friday close $42.65, -0.47 pct premarket
The largest U.S. meat processor said its profit more than doubled in the second quarter, mainly due to strong demand for chicken.
** MEMORIAL PRODUCTION PARTNERS LP, Friday close $23.14, +3.28 pct premarket
Memorial Production Partners said it would buy oil producing properties in Wyoming for about $935 million.
** COCA-COLA CO, Friday close $40.95, -0.49 pct premarket
Berkshire Hathaway Inc Chairman and Chief Executive Officer Warren Buffett said on Monday he had no desire to "go to war" with Coca-Cola and that U.S. companies were doing well under the current tax code.
** GENERAL MOTORS CO Friday close $34.97, -0.77 pct premarket
General Motors is recalling 51,640 Buick Enclave, Chevrolet Traverse and GMC Acadia SUVs of the 2014 model year because faulty software may cause the fuel gauge to read inaccurately, U.S. regulators said on Saturday.
** TARGET CORP, Friday close $62.01, -1.63 pct premarket
The company's Chief Executive and Chairman Gregg Steinhafel is leaving in the wake of the devastating data breach late last year that hurt profits, shook customer confidence in the No. 3 U.S. retailer and prompted congressional hearings.
** ORBITZ WORLDWIDE INC, Friday close $7.42, +6.20 pct premarket
The online travel agency on Monday reported higher-than-expected first quarter revenue and forecast revenue for the current period that topped current analysts estimates.
** GENERAL ELECTRIC CO, Friday close $26.68, -0.41 pct premarket
General Electric made tender offers to buy shares worth up to $389 million in two of Alstom SA's India units to comply with local rules, following its $16.9 billion bid to buy the French group's energy unit.
** CHEVRON CORP, Friday close $124.72
Sliding production and weak crude oil prices hampered Chevron in the first quarter, leading the second-largest U.S. oil producer, to report a profit well below Wall Street's expectations.
** GOLDMAN SACHS GROUP INC, Friday close $158.88, -1.60 pct premarket
A major proxy advisory firm recommended shareholders vote against Goldman Sachs executive compensation plan and added that Morgan Stanley was also paying its top staff too much.
** CHESAPEAKE ENERGY CORP, Friday close $28.28, -0.53 pct premarket
Michigan state prosecutors plan to call a former Encana Corp. executive to testify on behalf of the state, at a multi-day hearing in their criminal antitrust case against oil and gas companies Chesapeake Energy and Encana Corp that begins Monday.
** SINA CORP, Friday close $48.15, -3.01 pct premarket
Chinese Internet firm Sina said it was fined 5.1 million yuan ($815,038) by Beijing authorities for allowing "unhealthy and indecent content" on its online reading channel and on its main website.
** TYCO INTERNATIONAL, Friday close $40.81
The security systems maker said its board had approved a proposal to move the company's headquarters to Ireland from Switzerland, citing recent Swiss laws capping executive pay and tightening immigration rules.
** EBAY INC, Friday close $52.01, -0.50 pct premarket
PayPal, the payment processing arm of eBay, said on Saturday that it parted ways with a recently-hired strategy executive after he posted a series of disparaging and at times indecipherable tweets.
** OCCIDENTAL PETROLEUM CORP, Friday close $94.44, +0.88 pct premarket
The fourth-largest U.S. oil and gas company reported a 2.6 percent rise in first-quarter profit, helped by higher prices for crude oil and natural gas.
** NOKIA, Friday close $7.35, -0.82 pct premarket
The Finnish mobile communications equipment maker said it started a $100 million fund to invest in companies working on connecting cars.
** INTEL CORP, Friday close $26.41, -0.87 pct premarket
The chip giant submitted a plan to Israel's government to invest 20 billion shekels ($5.8 billion) in upgrading its plant in southern Israel, the Economy Ministry said. (Compiled by Natalie Grover; Edited by Maju Samuel)