“The last time U.S. housing saw such rampant price growth was in 2005, and the market corrected itself, infamously, in 2008. But the underlying reality today is different. Back then, a geyser of subprime adjustable-rate mortgages sputtered out as borrowers defaulted. (According to Bloomberg News, 60 percent of mortgages during the bubble years were adjustable rate; fewer than 0.1 percent of mortgages are now.) The current boom is better compared to a river, one fed by streams that have long been visible on the horizon: high demand, low supply and a dysfunctional economy in which wages are stagnant while restrictive zoning and poor public policy have turned housing into an artificially scarce commodity. Historically low 30-year fixed mortgage interest rates, hovering between 2.68 and 3.08 for the last year, are narrowing the riverbed, quickening the current.”