Fed-ECB Policy Divergence — EUR/USD Driver
The EUR/USD pair (trading ~$1.7T daily) is driven primarily by relative monetary policy expectations between the Federal Reserve and the European Central Bank.
When the Fed is hiking while ECB is pausing (or vice versa), the rate differential creates carry flows that systematically move the pair.
Unlike cyclical currencies (AUD, CAD), EUR/USD is dominated by institutional capital flows rather than commodity exposure.
Policy divergence mechanism:
When the Fed rate exceeds the ECB rate by 200bps+, USD-denominated assets offer structurally higher risk-free returns, drawing capital from EUR-denominated assets into USD.
This creates a negative flow for EUR/USD.
The inverse applies when ECB rates exceed Fed rates.
The pair also responds to relative economic growth differentials — a stronger US economy vs Eurozone accelerates the pair's downward pressure even at equal policy rates.
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