Final answer:
Brokerage firms are the most likely financial institution to invest a person's money in the stock market.
Step-by-step explanation:
The most likely institution to invest a person's money in the stock market would be brokerage firms.
Brokerage firms are financial institutions that specialize in buying and selling stocks on behalf of their clients. They have the expertise and resources to provide guidance and execute trades in the stock market.
Some well-known brokerage firms include Charles Schwab, TD Ameritrade, and E*TRADE.
Learn more about Investing in the stock market