Following the Money Behind AI

Where is all the money investing in AI actually coming from?

A friend asked me this recently. It's a question worth considering. The numbers being thrown around are enormous, so let's break down who's actually writing the checks.

The largest source is the hyperscalers themselves. Microsoft, Google, Meta, and Amazon collectively hold over $420 billion in cash, and they're deploying it at a historically unprecedented pace. Combined, these four companies plan to spend $725 billion on AI infrastructure in 2026 alone, up to 77% from last year's record. To bridge the gap between cash on hand and capex commitments, they've also gone to the bond market: $108 billion in corporate debt was raised in 2025, with projections suggesting $1.5 trillion in total issuance over the next several years.

The charts below tell the structural story. Capex has tripled since 2022 and isn't slowing down. The right chart is where it gets interesting: operating cash flow is rising, but capex is eating into it so aggressively that free cash flow is being compressed toward levels that would make any traditional analyst uncomfortable. These companies are betting the revenue will follow the spending. For example, Amazon's free cash flow declined 95% on a trailing-twelve-month basis. The bull case depends on enterprise AI revenue catching the capex curve before investor patience runs out.

Source: J.P. Morgan Guide to the Markets

Beyond the hyperscalers, two sources often get overlooked. Sovereign wealth funds from Gulf states, Singapore, and Qatar deployed $66 billion into AI and digital infrastructure in 2025. These aren't financial investors chasing quarterly returns. They're buying pre-IPO equity in what they believe will be foundational global infrastructure, with 10 to 20-year time horizons. Saudi Arabia's PIF, Abu Dhabi's Mubadala, and Singapore's Temasek are now among the most consequential capital allocators in the AI ecosystem.

The second overlooked source is you... or more precisely, anyone who owns an S&P 500 or Nasdaq index fund. Because Microsoft, Nvidia, Meta, Alphabet, and Amazon dominate passive index weights, every dollar flowing into a broad market ETF mechanically flows to these stocks. AI-focused ETF inflows alone jumped from $4.2 billion in 2024 to $19 billion in 2025. You don't have to make an explicit AI bet. Buying QQQ is an AI bet, whether you intend it to be or not.