NEW YORK ( TheStreet) -- There isn't much written about the issue in the national media, where the focus is on gun violence and fiscal cliffs, but the U.S. is in the midst of a mortgage refinancing boom that should continue well into 2013. According to the Washington, D.C.-based Mortgage Bankers Association's weekly applications survey, refinancings were up 8% from the first week in December and are at their highest levels since January 2009. Overall mortgage loan application volume was up 6.2%, according to the MBA index, signaling a white-hot mortgage market thanks to a slightly improving economy and continued low mortgage rates. The BankingMyWay.com Weekly Mortgage Rate tracker shows 30-year fixed mortgage rates at 3.44%, while 15-year fixed mortgages at a rock-bottom 2.86%. Adjustable-rate mortgages are at bargain basement levels. The BMW tracker has one-year ARMs at 3.20% and five-year ARM's at 2.53%. "Continued uncertainty due to the lack of resolution regarding the fiscal cliff led interest rates lower last week, with mortgage rates reaching a new low in our survey," offers Mike Fratantoni, the MBA's vice president of research and economics. "Refinance activity increased, with the refinance index hitting its highest level in two months, and the refinance share reaching its highest level since January 2009," he adds. "Applications for purchase increased for a fifth consecutive week, and are running almost 10% above their level at this time last year." Just how excited are mortgage consumers over low rates? The MBA says that 84% of all total mortgage applications are refinancings right now, with fixed-rate mortgages encompassing 97% of all refinancings. That's a good sign for the housing market and for the economy, as fewer people are opting for riskier adjustable-rate mortgages, which were a key negative driver in the housing market collapse of 2008 and 2009. Mortgage rates are so low that one national mortgage lender calls the current housing market a "once-in-a-lifetime opportunity."