CHICAGO—The historically low cap rates for all major net lease sectors remained unchanged or declined in the fourth quarter, according to a new report from the Boulder Group, a net lease firm in suburban Chicago. Single tenant retail properties remained at their historic low rate of 6.25% and rates for the office and industrial sector reached new historic lows of 7.00% and 7.44%. Over the course of 2015, cap rates for retail, office, and industrial properties declined by 15, 35 and 26 bps respectively.