Standard deviation shows the range in which the short-term returns vary from the long-term average.

The negative returns varied depending on the strategy, the study showed.

It measures how much a fund's returns vary from the mean.

As a group, the study said, little funds perform no better than big ones, though their returns vary more widely.

As with any investment, however, returns vary widely by company.

However, unlike traditional securities, the return from holding an option varies non-linearly with the value of the underlying and other factors.

A first consideration in picking a money market fund is its expenses, since the returns do not vary much.

Keep in mind that these numbers can change, so the return on anything you do today may vary by the time you are ready to sell.

Because investors choose which businesses and at what rate they lend, returns vary.

The expected return from coin roll hunting also varies based on what denomination is searched.