S mall caps and blue chips lagged a generally down market Friday as the Russell 2000 and Dow Jones Industrial Average were responsible for most of the selling. Meanwhile the Nasdaq and S&P 500 tried to limit losses as Nvidia NVDA and Palantir PLTR continued to attract buyers on the stock market today.

The stunning rise of Nvidia Corp to become the first publicly traded company valued at $4 trillion underscores the massive importance to the stock market of the AI chipmaker and the technology sector.