Free trade is known as a zero-sum game because one trader's gain is another's loss.
Free trade is a trade that does not restricted purchase (import) of goods and sales of goods and services (export) between countries.
A free trade operates in a market where a gain or profit to one is a loss to another individual and eventually the overall profit is zero.
Therefore, Free trade is known as a zero-sum game because one trader's gain is another's loss.
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