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Lend money at a rate linked to the prime rate
Yes.  In the US these are called certificates of deposit or savings accounts.  Every run-of-the-mill bank offers them.  You give the bank money and in return they pay you an interest rate that is some fraction of or (negative) offset from the returns they expect to make from your money. Since most investments that a bank makes (say, loaning money to a local business) are themselves based on some multiple of or (positive) offset from the prime rate, in return the interest rate that they offer you is also mathematically based on the prime rate. You can find lists of banks offering the best returns on CDs or savings accounts at sites like BankRate.