He has a chance, at this week's summit in Helsinki, to put relations with the United States on a steadier footing.

ECONOMIST: A cautious cheer for a reshuffled Kremlin

That trend has reversed though and one analyst says the currency may slide even further against the dollar before finding steadier footing.

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That would put the global recovery on a steadier footing, especially if a stronger yuan were mirrored by appreciation of the currencies of other Asian emerging economies.

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