Once you open an account all it takes to get started is enough money to cover the cost of a single share of a stock and the trading commission. (nerdwallet.com)
The Dividend Discount Model or DDM treats a single share of stock as a machine that outputs free cash flows, in the form of dividends. (dividendstocksrock.com)
According to Rick Ferri, if you were to try to buy a single share of every stock in the Dow Jones Industrial Average during the 1950s, commissions would have eaten up over 11 % of the purchase price. (awealthofcommonsense.com)