...We see the generation fleets as complementary. Our assessment of Constellation's standalone business risk profile reflects its strong position as one of the largest wholesale electricity producers in the U.S. On a stand-alone basis, the company has a large footprint, with approximately 33 gigawatts (GW) of generating capacity and adequate geographic diversity, although its assets are concentrated (approximately 67%) in the Midwest and Mid-Atlantic regions. It mostly derives its output from nuclear generation (at about 87% of aggregate); the balance is a mix of natural gas, oil, and renewable assets....