The S&P 500 Index gained another 9%. And his former colleagues capitulated on their bearish views. But to the celebrity strategist, who was among the last pessimists standing against this bull market ...

Warren Buffett shares his thoughts in his annual letter to shareholders, where he gave his advice about greed and fear.

Worries about President Donald Trump’s tariffs are hurting U.S. stocks. The S&P 500 sank 1.7% in early Monday trading ...

Donald Trump’s plans to ensure America’s AI leadership could fail without enacting policies to attract and retain foreign ...

The DeepSeek saga offers investors valuable lessons on the risks that come from a market so heavily focused on one theme.

Canada and Mexico vow U.S. trade retaliation, Alphabet and Amazon earnings renew focus on DeepSeek AI claims, and more news ...

Dow, S&P 500, and Nasdaq futures are also falling in premarket trading Monday as the stock market digests Donald Trump's latest tariffs moves.

The Chinese company’s low-cost, high-performance A.I. model has shocked Silicon Valley, and a longtime China watcher warns that the West is being leapfrogged in many other industries, too.

A version of this article originally appeared in Quartz’s members-only Weekend Brief newsletter. Quartz members get access to ...

The calm didn’t last long. After a brief dip, investors are bracing for further stock-market volatility in the face of a ...

Importantly, other Wall Street analysts seem to be thinking along similar lines. Despite the DeepSeek news, Nvidia still has ...