Nvidia is reporting earnings on Wednesday. Of course, the AI chipmaker is the focus of the market most days. Nvidia (NVDA) is one of the so-called Magnificent Seven — the large-cap technology companies that generate the most interest and arguably the highest profits in the stock market, particularly the S&P 500 index (^SPX). The group includes Nvidia, Apple, Amazon, Google's parent company Alphabet, Facebook's Meta, Microsoft, and Tesla. If you're thinking about buying Nvidia, a portfolio manager says cons ...