Can AI Justify $1.1 Trillion? The 2.7x Productivity Math That Wall Street Is Watching

The math behind the AI buildout is getting ugly. According to new research, the five biggest players might need to boost productivity by 2.7 times by 2030. This is to cover nearly $1.1 trillion in infrastructure spending. We are talking about Alphabet, Microsoft, Amazon, Meta and Oracle. This comes from a study by Wharton finance professor Jessica Wachter and Jonathan Wachter published in the MIT Technology Review. Their analysis says the sector would need a 2.7-fold productivity increase by 2030 after accounting for capital costs, depreciation and a 15% return. If the expected boom fails to appear, the buildout could become the largest misallocation of capital in history.

Morgan Stanley has put a price tag on this global data-center construction boom. The firm estimates nearly $2.9 trillion will be spent between 2025 and 2028. Of that, about $1.5 trillion relies on external capital. This shifts the risk profile significantly. The industry is leaning heavily on debt and private credit markets to fund the massive expansion. As this reliance grows, AI infrastructure risk spreads beyond the major technology companies. Stijn Van Nieuwerburgh, a Columbia Business School professor, has examined how the buildout spreads leverage across developers, lenders and structured-finance vehicles.

The pressure is already visible in the quarterly reports. Alphabet reported negative free cash flow of $5.9 billion in the second quarter of 2026. This was the first time the company saw negative numbers since it went public in 2004. Capital expenditure is climbing sharply as the tech giants race to secure chips and power. The unresolved question is whether productivity and revenue can rise fast enough to match infrastructure commitments. The buildout has been years in the making.

The financing structure is becoming complex and opaque. Look at Meta’s Hyperion project in Louisiana. It is a roughly $27 billion campus. Funds managed by Blue Owl Capital own 80% of the joint venture. Meta only retains 20%. This illustrates how external financing fundamentally alters the risk profile of these assets. Gary Gensler, former SEC chair and MIT Sloan professor, described the broader AI investment cycle as a "parlay bet by the capital markets and the economy."