The CRSP US Total Market Index is a comprehensive benchmark that represents the entire U.S. stock market. It includes a wide range of companies, from large-cap to small-cap stocks, covering various sectors and industries. This index is designed to reflect the performance of all publicly traded U.S. companies, making it a useful tool for investors seeking broad market exposure. Managed by the Center for Research in Security Prices (CRSP), the index is frequently used by investment funds and financial professionals to gauge market performance. It provides a clear picture of the overall health of the U.S. economy and serves as a foundation for many investment strategies.