The national foreclosure inventory dropped by about a quarter year over year, bringing the number of homes in the process of foreclosure at the end of January to 456,000 units from 583,000 in January 2015, a decline of 21.7 percent. CoreLogic said the inventory, which represented 1.5 percent of all mortgaged homes in January 2015 has been stable at a 1.2 percent rate since last October although the number of units in the inventory has now reached the lowest level since November 2007.