Shorting major currencies is easier than shorting stocks. It's done fairly easily on the futures market, where you create a contract (effectively with the excha

Shorting major currencies is easier than shorting stocks. It's done fairly easily on the futures market, where you create a contract (effectively with the exchange) that says you agree to deliver a certain number of pounds at a predetermined point in the future in exchange for a certain number of dollars today. If the pound falls relative to the dollar, you make a profit.