Money trading used to be the domain of banks and large financial institutions. Now, however, this can be accessed by most people through the foreign exchange forex market. People can now buy and sell various types of currencies with nothing more than computers and internet connections.
This is an investment in money rather than shares. This is a solid investment because there is no indicator of a country's economic status that is better than their money. It is possible to predict when a country's currency will rise or fall in value by looking at its overall economic environment. You can buy foreign currency from Xchange of America.
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Foreign currency trading is usually done in pairs. Someone uses one type of money to buy another. When the value of the money they buy increases or the money they buy decreases, they can exchange it again to make a profit. By making several of these trades a day, one can make a little money from small changes in value.
Because the forex market is open 24 hours a day, except on weekends, it can be done from anywhere in the world at any time. That also doesn't require a large account. Many forex brokers offer mini accounts that allow people to start trading foreign currencies with no more than a few hundred dollars.
It is also possible to start learning to trade foreign currencies without risking real money at all. Many brokers offer demo accounts where one can trade using imaginary money. These accounts offer real-time data about market movements so that one can start predicting where he is going. As a result, they will be far better prepared when they really invest.