The Czech koruna showed weakness against the US dollar during Wednesday's early deals. At 2:50 am ET, the koruna slipped to a 6-day low of 20.3240 against the dollar, compared to 20.0975 hit late New York Tuesday. If the Czech currency falls further, 20.74 is seen as the next target level. The dollar-koruna pair is currently trading at 20.22.

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