The composite index of lagging indicators is published monthly by The Conference Board to track changes in the business cycle after they have occurred. It comprises seven economic measures weighted as follows: the average prime rate charged by banks (28.15%), consumer debt to income ratio (21.01%), change in consumer price index for services (19.55%), business inventories to sales ratio (12.11%), commercial and industrial loans (9.7%), change in labor costs per unit of output (5.87%), and average duration of unemployment (3.61%). The index provides confirmation that the business cycle has shifted to a new stage, indicating peak and trough turning points. In March 2013, the lagging index increased 0.