Peter Lynch Quote
There's no use diversifying into unknown companies just for the sake of diversity. A foolish diversity is the hobgoblin of small investors. That said, it isn't safe to own just one stock, because in spite of your best efforts, the one you choose might be the victim of unforeseen circumstances. In small portfolios, I'd be comfortable owning between three and ten stocks.
One Up On Wall Street: How To Use What You Already Know To Make Money In (ed. Simon and Schuster, 2012) - ISBN: 9781439126158