CHICAGO–(BUSINESS WIRE)–ComEd today announced that customers participating in its Hourly Pricing program have saved more than $63 million on electricity supply costs to date while helping reduce energy demand during periods of peak electricity use. The program has reached a record 70,000 residential customers following its largest single year of growth since launching in 2007. More than 80 percent of participants reduced their electricity supply costs compared with ComEd’s standard fixed-pric