Stock market today: Nasdaq clobbered, Nvidia sinks 17% while Dow stages comeback as AI fears shake markets

What is DeepSeek, the Chinese AI company upending the stock market?

DeepSeek Deep Sixes the Stock Market. How Far the S&P 500 Could Fall.

Defensive health care sector beating market and one name is breaking out, according to the charts

SEC OKs Nasdaq Pulling Diversity Rules After 5th Circ. Loss

CHART OF THE DAY: We Took Our Nasdaq $QQQ Position to Its Minimum Last Week (Watching This Morning)