As I noted when I made this proposal public, achieving diversification and realizing a saving for the city is complicated.

Now, however, online investors can achieve reasonable diversification - say, a dozen stocks - at less long-term expense than if they bought mutual funds.

This combination of higher volatility and reduced correlation has profound implications for how many stocks an investor needs in a portfolio in order to achieve adequate diversification.

Some investors find it easier to achieve diversification through ownership of mutual funds rather than through ownership of individual stocks or bonds.

Lenders also have the option to use an automated tool to lend to a pool of borrowers to achieve diversification very easily.

Thurgood Marshall School of Law has been consistently ranked number one in achieving diversification in its student body.

Mr. Hopewell says that it's well worth paying an efficient no-load fund manager perhaps three-quarters of 1 percent a year to achieve diversification.

Conglomerates can trade at a discount to the overall individual value of their businesses because investors can achieve diversification on their own simply by purchasing multiple stocks.

Mr. Cumbie suggests that investors need at least $50,000 to buy enough bonds, from different issuers and with different maturities, to achieve enough diversification.

The firm was among the first U.S. money managers helping investors achieve greater diversification through global investing.