How to invest in Nike
Nike has been publicly traded for more than 40 years. Anyone can invest in the stock if they want to. All you need is a brokerage account. If you don't have one, you can open one up with a brokerage like Charles Schwab (SCHW +0.59%), Fidelity, Robinhood (HOOD +9.12%), or E*TRADE from Morgan Stanley.
At the time of writing, a share of Nike costs less than $100, so it's relatively affordable. However, if you'd like to buy less than that, you can buy fractional shares through most brokerages.
Once you've decided to buy the stock, all you need to do is decide how much you want to invest and hit the buy button. Typically, it's a good idea to limit new investments to 10% or less of your portfolio value to remain adequately diversified, even for a blue chip stock like Nike.