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The U.S. Dollar Index has broken above its highest level in one and a half years, signaling a broad strengthening of the greenback across major currency pairs. For systematic traders, this move reshapes carry dynamics, volatility regimes, and the risk‑adjusted attractiveness of dollar‑denominated assets. Below we explore how the rally fits within macro‑fundamental frameworks, what it means for model calibration, and how to incorporate the shift into a disciplined quantitative workflow. Macro Drivers Behind the Dollar Rally The recent climb in the index reflects a confluence of monetary policy divergence, fiscal expectations, and market sentiment. The primary driver is the relative tightening of U.S....