Wall Street volatile as Shanghai seesaws

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Wall Street volatile as Shanghai seesaws
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Brendan McDermid | Reuters. U.S. stock index futures pointed to a higher open on Wednesday after a highly-volatile session for China's Shanghai Composite, with investors left largely unimpressed by the stimulus measures from the People's Bank of China.
U.S. stock index futures pointed to a higher open on Wednesday after a highly-volatile session for China's Shanghai Composite (Shanghai Stock Exchange: .SSEC), with investors left largely unimpressed by the stimulus measures from the People's Bank of China.
Investors are finding it difficult to know which direction to turn, with global indices flipping wildly between gains and losses after brutal selling seen at the start of the week. China's benchmark Shanghai Composite finished down 1.3 percent after fluctuating throughout the day.
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Futures extended gains, with the Dow indicating a higher open by as much as 300 points, before paring some gains after China's central bank said on Wednesday it had injected 140 billion yuan ($21.8 billion) into the interbank money market via short-term liquidity operations (SLOs).
The Peoples' Bank of China fired a double-barrelled easing shot on Tuesday - lowering interest rates and the reserve requirement ratio (RRR) by 25 basis points and 50 basis points respectively - but this was not enough to reassure markets of slowing growth fears.