The Dallas Fed Manufacturing Index measures the performance of manufacturing sector in the state of Texas. The index is derived from a survey of around 100 business executives and tracks variables such as output, employment, orders and prices. A reading above 0 indicates an expansion of the factory activity compared to the previous month; below 0 represents a contraction; while 0 indicates no change. Texas produces around 9.5 percent of manufacturing output in US. The state ranks second behind California in factory production and first as an exporter of manufactured goods.