: Decide how many full shares you want. Some brokers like Stash or Public allow "fractional shares," letting you buy with as little as $1 or $10.

Most investors use standard brokerage platforms for speed and flexibility.

: Use a Market Order to buy immediately at the current price, or a Limit Order to specify the maximum price you are willing to pay.

How To Invest In Costco Stock - COST Share Price ... - Stash

: Enter the ticker symbol COST into your broker's search bar.