In a presentation to investors related to earnings for the period ending December 31, 2018, Exelon included certain metrics concerning its Constellation business.

Exelon stated Constellation metrics as:

• 78% retail power customer renewal rate

• 92% natural gas customer retention rate

• Average customer duration of more than 6 years

• 30% power new customer win rate

• 25 month average power contract term

• Stable Retail Margins

Exelon is holding an earnings call later this morning

More details on Exelon earnings can be found here

Exelon's Generation segment (which includes competitive retail) had a GAAP Net Loss of $178 million in the fourth quarter of 2018 compared with GAAP Net Income of $2,224 million in the fourth quarter of 2017. Generation’s Adjusted (non-GAAP) Operating Earnings for the fourth quarter of 2018 decreased to $221 million from $261 million in the fourth quarter of 2017, primarily reflecting lower realized energy prices, partially offset by the favorable impacts of Illinois ZEC revenue, increased capacity prices and tax savings related to the TCJA.