While the year-long surge in the Dollar has been a welcome development for American consumers and the US government (in terms of cheaper imports and easy credit, respectively), American businesses are not smiling. The strong Dollar has resulted in decreased competitiveness in the eyes of foreign consumers, and consequently, lower exports. For this reason, the US trade deficit has not shrunk significantly, despite a slight down-tick in imports. One must also look at the overseas earnings of American multinational corporations, which are frequently repatriated to the US and booked in Dollar-terms. In fact, as much as 50% of S&P 500 member company profits now come from overseas. Simply, lower exchange rates mean lower profits. In short, investing in the stocks of companies as a proxy for the markets in which they do business is not (as) profitable when the Dollar is strong. The Financial Times reports:

As a result of this greater impact of currency swings, companies are starting to put greater emphasis on trying to hedge their foreign exchange exposure, according to a recent survey from JPMorgan.

Read More: US company earnings hit by turbulence in currency markets