It was just 20 years ago that energy and industrial stalwarts ExxonMobil and General Electric were the world's most valuable ...

Interactive Brokers and Talen Energy stocks jumped on news shares would be included the S&P 500 and the S&P MidCap 400 ...

Yet, as of this writing, there are eight American companies with market caps greater than Berkshire's $1.05 trillion market ...