With the yen at a 40-year low, here’s when Japan could intervene to catch the market off balance

Japan's central bank could conduct currency intervention when U.S. trading volumes are reduced due to holidays, according to analysts who monitor foreign exchange markets. The yen has reached its lowest level against the dollar in four decades. Currency interventions typically occur when central banks buy or sell their currency to influence its value. The Bank of Japan has previously indicated it would take action if yen weakness accelerates further.

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