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Investment (投资) is a key way for business to grow and for investors to make money. But there are two types of risk (风险) related to investment. One risk is that if the company you invest in fails, you will lose everything. The other type of risk is how much the value of your investment can change. Some investments swing (波动) wildly: one month they are worth four times what you put in, the next month they are worth only one quarter of the money you invested in.