What exchange rates tracks
Exchange Rates sits at a specific point in the macro system. This section covers what the concept captures, what it leaves out, and why it matters.
In September 1992, George Soros's Quantum Fund shorted the British pound, forcing the UK out of the European Exchange Rate Mechanism. The pound depreciated 15% in days. The episode illustrated that fixed exchange rate commitments are only as credible as the reserves and political will behind them -- and that speculative attacks can overwhelm central bank defenses when capital is mobile and fundamentals are misaligned.
Exchange rates sit at the intersection of monetary policy, trade, and capital flows. A dollar appreciation makes U.S. exports more expensive and imports cheaper, shifting purchasing power abroad. A depreciation does the reverse -- but also raises import prices and can fuel inflation. Central banks must weigh all of these transmission channels when setting policy in an open economy.
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