The US NFCI stands for the National Financial Conditions Index, published weekly by the Federal Reserve Bank of Chicago. It provides a comprehensive weekly gauge of U.S. financial stability across money markets, debt and equity markets, and both traditional and shadow banking systems by aggregating over one hundred distinct financial indicators. The index captures risk, credit, and leverage sub-components to give economists, policymakers, and investors a timely overview of how tight or loose financial conditions are relative to historical norms.