There is a wide variety of investments available for every kind of investor: Stocks, bonds, Mutual Funds, ETFs, Annuities, real estate, private equity, hedge funds, and so on.
The vehicles for these investments also vary widely – you can buy stocks, bonds, mutual funds, and ETFs, for instance, in a brokerage account at a major custodian, or an IRA or 401(k) offered through a retirement plan.
Annuities and other insurance products are often sold directly from the insurance companies, and often times banks offer vehicles and accounts you can use to invest.
What are the Basics of Stocks?
What does Equity or Security Mean in the context of Capital Markets?