Digging Deeper Than Earnings: The Reserve Life Index and What It Reveals About Coal Companies' Futures
Quarterly earnings reports capture most investors' attention, but the reserve life index quietly tells a more consequential story about a coal producer's long-term viability. Understanding how to locate and interpret this metric in SEC filings can give disciplined investors a meaningful edge before the broader market catches on. This analysis walks through the calculation, the context, and the real-world implications of reserve runway data across active U.S. coal producers.