Source:-https://www.fool.com/investing If there’s one constant on Wall Street, it’s that nothing remains constant for long. The combination of technological innovation, competitive advantages, acquisitions, and other tangible and intangible factors has a tendency to shake-up the world’s largest companies on a regular basis. For example, in 2004, General Electric, ExxonMobil, Pfizer, Citigroup, Walmart, BP, AIG, Intel, and Bank of America were nine of the 10 largest publicly traded companies by market cap. None are still in the top 10 just 17