Offer your thoughts or opinion on the input financial query or topic using your financial background.

Can I buy only 4 shares of a company?
Simple answer: Yes  A better question to ask might be "Should I invest all my savings to buy 4 shares of a single stock." My answer to that would be "probably not". If this is your first venture into the world of owning publicly traded companies, then you're better off starting with some sort of mutual fund or ETF. This will start your portfolio with some amount of diversification so you don't have all your eggs in one basket. If you really want to get into the world of picking individual stocks, a good rule of thumb to follow is to invest $1 in some sort of indexed fund for every $1 you invest in an individual stock. This gives you some diversification while still enabling you to scratch that itch of owning a part of Apple or whatever other company you think is going in the right direction.