The FT Wilshire 5000 Index (FTW5000) is a stock market index that provides a comprehensive measure of the U.S. equity market. The FTW5000 tracks the performance of all publicly traded stocks in the United States, including both small and large cap stocks, and is considered to be one of the broadest measures of the U.S. stock market.The FTW5000 is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group, and is a subset of the Wilshire 5000 Total Market Index, which is one of the largest and most widely followed equity indices in the world.The FTW5000 is used as a benchmark by many mutual funds and exchange-traded funds (ETFs) that aim to provide exposure to the overall U.S. stock market. It is also used by financial analysts and market participants to gauge the overall health of the U.S. stock market, as well as the performance of individual sectors and industries within the market.It's worth noting that the FTW5000 is a market capitalization weighted index, which means that larger companies have a greater impact on the index's performance than smaller companies. As such, the index may not accurately reflect the performance of smaller companies in the U.S. stock market.