The Dodge Momentum Index retreated 0.8% in March compared to February, according to McGraw Hill Construction. The index is a monthly measure of the initial reports for non-residential building projects entering the planning stage, a lead indicator of construction spending within the next year. The March index was 113.8, down from a revised 114.8 in February and 118.3 in January. New plans for commercial buildings fell 1%, as declines in offices and hotels offset an increase in retail buildings, Dodge says.