US futures, Asia markets fall; data center stock sinks 44%

The retreat in US stock futures and Asian markets reflects a shift from optimism to doubt about the economics of AI. The trigger was concrete: an Australian data center operator's profit warning wiped as much as 44% off its stock, a single event that quickly colored sentiment across markets.

Behind it sit two distinct worries. One is physical — supply chain constraints and local opposition, which have blocked or delayed dozens of large US facilities this year. The other is financial — whether revenues will keep pace with Big Tech's breakneck infrastructure spending. As Apollo's chief economist put it, a slowdown in spending on compute tokens suggests productivity returns on AI investments are either arriving far slower than projected or failing to materialize at all, with knock-on effects for AI firms' revenues.

What makes this moment notable is that the concerns are no longer abstract. A profit warning, blocking of projects on the ground, and weaker token spending are tangible signals that could feed into each other, though how far the caution spreads remains unclear.