Meta and Microsoft Double Down on Huge A.I. Spending, Despite DeepSeek Threat

Faced with unconventional and disruptive proposals, investors are figuring out how to place their bets.

An American obsession is attracting investments in baseball fields, volleyball courts and football camps, intensifying the gap between families with means and those without.

Investors cheered the Federal Reserve chair’s assessment. But some economists fear a case of déjà vu.