Because there are two separate controllers in each USB 3.0 host, USB 3.0 devices transmit and receive at USB 3.0 data rates regardless of USB 2.0 or earlier devices connected to that host. Operating data rates for earlier devices are set in the legacy manner.
The Dow Jones Industrial average (DJIA) and NASDAQ Composite Index are indexes that track the movement of a number of different stocks. The DJIA is made of companies that are traded on the New York Stock Exchange while the NASDAQ index is composed of companies that are traded on the NASDAQ stock exchange.
Along with the S&P 500 and the NASDAQ, the DJIA is one of the oldest and most widely used market indexes in the world. Many investors choose to invest passively alongside the Dow by investing in index funds and exchange-traded funds (ETFs), which mimic the performance of specific market indexes.