The document discusses the growth of stock exchanges around the world over the past few decades. It notes that in 1988 stock exchanges existed in 63 countries, but by 2005 that number had grown to 145 countries, representing 92% of the global population and 99% of global GDP. This growth has created opportunities for exchange operators to expand into new markets and for investors to diversify internationally. However, many of the newer exchanges are still immature with limited trading and foreign investment. As these markets continue developing, they have the potential to increase global liquidity and wealth.