The ins and outs of membership in the 30-company group that represents success across industries and reflects stock market conditions.

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

Also know that, unlike the S&P 500 or the Nasdaq Composite, the Dow is weighted by price rather than by market cap. Although Nvidia has an outsized influence on the movements of the cap-weighted benchmarks, at current prices NVDA stock will be as important to the DJIA as, roughly, 3M ( MMM ).