Following a generally positive performance in 2015, the Architecture Billings Index has begun this year modestly dipping back into negative terrain. 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 January ABI score was 49.6, down slightly from the mark of 51.3 in the previous month. This score reflects a minor decrease in design services (any score above 50 indicates an Increase in billings). The new projects inquiry index was 55.3, down from a reading of 60.5 the previous month. Read complete press release here.