Finally, AT&T was the last stock in the last decade to be removed from the Dow as it was ousted in 2015. It has underperformed badly since then with a share price down 12% as the telecom market has been sluggish and it's lost market share to T-Mobile.

On Friday, S&P Dow Jones Indices announced that AI chipmaker Nvidia will replace Intel in the Dow Jones Industrial Average, marking a seismic shift in the semiconductor industry and ending Intel's 25-year run on the prestigious stock market index.

The change, starting next Friday, lifts a dominant player in artificial intelligence over its chip-making rival, which has struggled to keep up.