After a stand-alone month of contracting demand for design services, there was a modest uptick in the Architecture Billings Index (ABI) for October. As a leading economic indicator of construction activity, the ABI reflects the approximate nine to twelve month lead time between architecture billings and construction spending. The American Institute of Architects (AIA) reported the October ABI score was 51.7, up from a score of 49.1 in the previous month. This score reflects an increase in design services provided by U.S.