In the event of a severe economic crisis, Fannie Mae and Freddie Mac could need a bailout of up to $125.8 billion, according to a Federal Housing Finance Agency stress test released this week. The test of severely adverse scenarios, required by the Dodd-Frank Act for companies with total consolidated assets of more than $10 billion, took place in March and is based on Fannie and Freddie portfolios as of Dec. 31, 2015. The bailout would be needed on an incremental basis and would also depend on the treatment of the government-sponsored enterprises’ deferred tax assets. Under this hypothetical economic scenario, situations include...