MSCI Indexes are a series of stock market indices created by Morgan Stanley Capital International to measure the performance of various segments of the global equity market. These indices cover different regions, countries, and sectors, providing investors with benchmarks to evaluate their investments and understand market trends. The most well-known index is the MSCI World Index, which includes large and mid-cap stocks from 23 developed countries. Other indices, like the MSCI Emerging Markets Index, focus on stocks from developing economies, helping investors diversify their portfolios and gain exposure to different markets.