The Index consists of liquid United States dollar-denominated, high yield corporate bonds for sale in the United States, as determined by International Index Company Limited. HTG is based in Boston, MA.
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction. Most of the digital electronics that you build will use DC.
Defining Alternating Current. Alternating current is simply the movement of electrical charge through a medium that changes direction periodically. This is in contrast with direct current (DC), where the movement of charge is only in one direction and is constant.