The U.S. Department of Justice (DOJ) announced Monday afternoon that it’s going after a group of companies for alleged racial discrimination in mortgage refinancing applications. What To Know: The DOJ filed a lawsuit against Rocket Companies Inc.’s (NYSE:RKT) Rocket Mortgage; as well as Solidifi US; Maverick Appraisal Group and Maverick CEO Maksym Mykhailyna, alleging that the parties discriminated against a Black homeowner by “undervaluing her home based on her race” in an appraisal that takes place when a homeowner files to refinance their mortgage. The DOJ also alleged Rocket Mortgage furth…