high - Dollar exhibits counter-cyclical behavior during global downturns (strengthens as safe haven) but pro-cyclical tendencies during U.S.-specific growth acceleration. Strong U.S. GDP growth relative to eurozone/Japan typically drives 5-8% dollar appreciation through rate differential expectations. Global recessions can produce 10-15% dollar rallies as capital flees to safety, while synchronized global growth often weakens the dollar as investors seek higher-yielding foreign assets.

extreme - Dollar is primarily driven by real interest rate differentials. Each 25bp Fed hike (holding foreign rates constant) historically drives 2-3% dollar appreciation. The 2-year Treasury yield spread versus German bunds shows 0.85+ correlation with EUR/USD movements. Rising U.S. rates attract foreign capital flows into Treasuries and dollar-denominated assets, while Fed easing cycles (2019, 2020, anticipated 2024) typically produce 5-10% dollar declines as carry trade attractiveness diminishes.

momentum and macro hedge - Attracts tactical traders positioning for Fed policy shifts, portfolio hedgers seeking dollar exposure against foreign equity/bond holdings, and safe-haven seekers during risk-off periods. Not suitable for buy-and-hold given negative carry during easing cycles and roll costs. Typical holding period 3-12 months aligned with Fed policy cycles.