online brokerages
The amount needed depends on the brokerage firm and the investments you're interested in. Some online brokerages have no minimum deposit requirements, allowing you to start investing with a small amount of money. However, the price of individual stocks and the minimum investment for certain mutual funds or ETFs might require you to start with more of an initial investment. That said, there are many brokerages and investment options now for those starting with less to invest than there were a decade or two ago.