From Motley Fool:
Large-cap stocks tend to be heavily discussed by the financial media — and for good reason. Like their small- and mid-cap counterparts, large-cap stocks started off as an idea, and through shrewd leadership and a proven business model, they have grown to market valuations of $10 billion or more, and made some long-term investors millionaires.
For investors, it’s hard to exclude these behemoths from their portfolios.