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The Japanese Yen has been sliding sharply against the U.S. dollar, creating fresh volatility in FX markets. For quantitative traders, the move is more than a headline; it reshapes carry‑trade economics, liquidity patterns, and the importance of latency in execution. This article dissects the market dynamics, connects them to a concrete speed illustration, and outlines actionable steps for a latency‑aware strategy. The Yen’s Recent Weakening and Its Drivers The yen’s depreciation is driven by a combination of divergent monetary policy, a widening interest‑rate gap, and persistent current‑account deficits. As the U.S. Federal Reserve maintains a tightening stance while the Bank of Japan keeps rates near zero, the forward premium on...