(Bloomberg) -- Japan is threatening to derail one of the most profitable currency bets this year: carry trades borrowing the yen to invest in emerging-market currencies. Most Read from BloombergSaudi Arabia Steps Up Arrests Of Those Attacking Israel OnlineTurkey Confirms All Trade Halt With Israel Over War in GazaHuawei Secretly Backs US Research, Awarding Millions in PrizesBiden Calls Ally Japan ‘Xenophobic’ Along With China, RussiaIn Jamie Dimon's America, the Stock Market Has Already VotedA g