The AI buildout races to prove its economics before financing pressure catches up.

Reuters reported that AI infrastructure investment has surpassed the inflation-adjusted scale of earlier railway and internet booms. PwC projects cumulative data-centre spending above $30 trillion by 2050, while an Anthropic prospectus reviewed by Reuters outlined $518 billion of planned spending in coming years.

Bain estimated that hyperscalers and other AI participants need more than $4.2 trillion of new revenue over five years to finance the buildout. JP Morgan said broad U.S. productivity gains remain elusive and warned that infrastructure booms can end when returns fail to materialise.