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Nixon shock - Wikipedia
nder the floating rate system, during the 1970s, the dollar plunged by a third. Further, the Nixon shock unleashed enormous speculation against the dollar. The German Mark appreciated significantly after it was allowed to float in May 1971. It forced Japan's central bank to intervene significantly in the foreign exchange market to prevent the yen from increasing in value. Within two days August 16–17, 1971, Japan's central bank had to buy $1.3 billion to support the dollar and keep the yen at the old rate of ¥360 to the dollar. Japan's foreign exchange reserves rapidly increased: $2.7 billion (30%) a week later and $4 billion the following week. Still, this large-scale intervention by Japan's central bank could not prevent the depreciation of US dollar against the yen. France also was willing to allow the dollar to depreciate against the franc, but not allow the franc to appreciate against gold.[citation needed]
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