Final answer:
Juan can choose to invest in mutual funds to balance the risks of purchasing start-up stocks and still keep his money in the stock market.
Step-by-step explanation:
The type of investment that Juan could choose to balance the risks of purchasing start-up stocks and still keep his money in the stock market is Mutual funds. Mutual funds pool money from multiple investors to invest in a diversified portfolio of stocks, bonds, or other securities. This diversification helps to spread out the risk and can provide a more stable return compared to investing in individual start-up stocks.
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