  |  | Wall St. falls for fourth straight day | NEW YORK (Reuters) - U.S. stocks fell for a fourth straight day on Wednesday as a World Bank forecast and further drop in copper prices fueled concerns about global weakness, though a late-day rebound in energy shares left the market well off its lows. | |  |   |  | Exclusive: Samsung approaches BlackBerry about buyout - source | NEW YORK (Reuters) - Samsung Electronics Co Ltd recently approached BlackBerry Ltd about buying the company for as much as $7.5 billion, looking to gain access to its patent portfolio, according to a person familiar with the matter and documents seen by Reuters. | |  | |  |  | Exclusive: JPMorgan presses its managers to cut costs - source | NEW YORK (Reuters) - Senior executives at JPMorgan Chase & Co are pressuring managers across the bank to cut costs, after the bank's disappointing revenue growth has prevented the profit gains the bank expected, a person familiar with the matter told Reuters. | |  | |   |  | Oil futures mark rare spike as options expire | NEW YORK (Reuters) - Oil futures marked their strongest gain in more than two years on Wednesday, snapping a four-day losing streak as traders turned briefly away from the bearish pressures of a worldwide glut to focus on technical trading ahead of options expiration. | |  | |   |  | JPMorgan hit by legal costs, Dimon says banks 'under assault' | (Reuters) - JPMorgan Chase & Co, the biggest U.S. bank by assets, reported a 6.6 percent drop in quarterly profit as legal costs exceeded $1 billion in the wake of government probes, leading Chief Executive Jamie Dimon to claim banks were "under assault." | |  | |   |  | Google partners with auto suppliers on self-driving car | DETROIT (Reuters) - Internet search company Google Inc has begun discussions with most of the world's top automakers and has assembled a team of traditional and nontraditional suppliers to speed efforts to bring self-driving cars to market by 2020, a Google executive said on Wednesday. | |  | |  |  |  | A daily digest of breaking business news, coverage of the US economy, major corporate news and the financial markets. 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