Shares on Wall Street have recorded the worst three-day streak since 2011 after another sharp move lower overnight, with investors continuing to fret over the end of the US Federal Reserve's bond buying programme.
Yahoo is close to investing millions of dollars in mobile messaging service Snapchat, which may value the start-up at about $10bn (£6.2bn), according to reports.
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HSBC has vowed to fight a $250m (£151m) lawsuit brought against it over its alleged involvement in the Keydata scandal.
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Standard Chartered has agreed to pay $300m (£180m) to New York's top banking regulator for failing to improve money laundering controls.