By Dan Weil A northeastern city is the most affordable in the U.S. In 2021, 27 U.S. housing markets were severely unaffordable, a study says. With U.S. home prices soaring 19.2% in the 12 months through January, it’s clearly difficult for non-wealthy people to afford a home. “There has been a strong trend away from affordability,” according to a study of world housing markets by the U.S. Urban Reform Institute and Canada’s Frontier Centre for Public Policy. “The number of severely unaffordable markets rose 60% in 2021 compared to 2019, the last prepandemic year.” In the U.S., 27 housing market…