The spring housing season hit a speed bump this week as rising mortgage rates and global economic uncertainty prompted both buyers and sellers to retreat. The latest  Weekly Housing Trends  report from the Realtor.com economic research team reveals a market in a state of trepidation as mortgage rates crept higher and home prices softened. New listings, which are a key measure of sellers’ willingness to enter the market, fell by 2.5% year over year for the week ending May 2, a deeper negative