Duke Energy (NYSE:DUK) -1.4% in Monday's trading after the North Carolina Utilities Commission approved a request to lower residential customers' costs by 4.5%, thanks to declining fuel prices. Duke (DUK) said a typical residential customer in North Carolina using 1,

Duke Energy bills will soon go down for North Carolina customers. Here's when the rate drop takes effect and how much you could save.

State regulators recently approved Duke Energy Progress' request to lower rates for residential customers by 4.5%.