Stocks Took an 18-Month Round Trip From Tech Bear to AI Bull

The same handful of megacap names that led the market down have been powering the latest surge.
Illustration: Brian Blomerth for Bloomberg Businessweek

Call it a bubble or an artificial-intelligence-driven hype cycle. But here’s another way of looking at the rally that sent the tech-heavy Nasdaq-100 to its best-ever first-half performance: a narrative round trip.

Only about a half-dozen companies are responsible for virtually all of the advance, leading to a lot of investor angst over how precarious the gains feel. But it’s possible to look at the same set of facts and conclude that nothing has changed in the market over the past 18 months. The clutch of technology giants that dominate the market got crushed when it seemed as if the US Federal Reserve would drive the economy into a recession, and in 2023 that view has been reconsidered.