Nowcasting Firms' Operating Activities from Satellite Data on Thermal Infrared Radiation

Practical real-world activities consume energy and emit thermal infrared radiation (TIR). Leveraging this physical fact, we develop a direct, real-time measure of firms operating activity using satellite data. Tracking 28,236 factories of Chinese listed firms, we find TIR declines significantly following operational shocks and strongly forecasts subsequent sales growth, costs, investment, employment, and profits. TIR also predicts future stock returns, especially among opaque firms and those with limited investor access, yet sophisticated investors largely ignore this information. Our findings highlight TIR as a distinctive, under-exploited indicator of corporate fundamentals.