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

Is there a difference between buying few shares of an expensive stock vs many shares of an inexpensive one?
One difference is the bid/ask spread will cost you more in a lower cost stock than a higher cost one. Say you have two highly liquid stocks with tiny spreads: If you wanted to buy say $2,000 of stock: Now imagine these are almost identical ETFs tracking the S&P 500 index and extrapolate this to a trade of $2,000,000 and you can see there's some cost savings in the higher priced stock. As a practical example, recently a popular S&P 500 ETF (Vanguard's VOO) did a reverse split to help investors minimize this oft-missed cost.