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As noted earlier, a change in the exchange rate can, in the short run, affect the demand for and supply of commodities, and the competitiveness of US agriculture. When the US dollar strengthens or gains in value, it causes importers to pay more for the US dollar to buy US commodities.
Government policy also affects a currencyâs exchange rate in other ways: elections, policy changes, and the balance of power of political parties can change the direction of a countryâs economy. As the economy increases or decreases, so does the currencyâs exchange rate.