The FTSE All-World Index is a stock market index that represents large and mid-sized companies across 47 countries, including both developed and emerging markets. It provides a comprehensive view of global equity performance, making it a useful benchmark for investors looking to diversify their portfolios internationally. This index is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group. It includes thousands of stocks, allowing investors to track the performance of a wide range of industries and sectors worldwide, reflecting the overall health of the global economy.