housing market and there's nothing the Federal Reserve can do about it. mortgages ...16 (Bloomberg) -- The biggest jump in the London interbank lending rate in at least seven years could wreak further havoc on the U.S. Sept. About 6 million U.S. Loans that aren't insured by the government are called conventional mortgages. The government-insured loans may be more attractive in terms of low down payment requirements but they may be more restrictive. The main advantage of applying for online mortgages is their convenience.