It's "Restaurant Week" at U.S. stock exchanges, with Outback Steakhouse owner Bloomin' Brands and Hardees parent CKE selling shares to the public this week.

The Net Asset Value (NAV) is the current price of a mutual fund, which is calculated at the end of each business day. It is the total value of the fund's assets minus its liabilities and divided by the total number of shares outstanding. It is similar to a stock's closing price for the day.

An individual investor (non-institutional investor) can trade before or after market hours through ECNs (Electronic Communications Network). Your broker will have a ECN selection in a drop-down menu if it is available to you.