AI Capex Rewires Credit and Infrastructure | Private Markets Midyear Review

What's New: 

The AI buildout has a financing problem only private markets can solve. The buildout amounts to a structural $10 trillion rewiring of the global economy, and private capital, not public markets, is where that financing is actually happening.

Why It Matters: 

The financing center of gravity for the defining capital cycle of the decade has moved from public markets to private ones. Investors treating AI exposure as a public equity question are missing where the actual dollars are flowing.

Big Picture Drivers:

• Power, not capital, is the constraint. Brookfield's Sikander Rashid argued the buildout will not be limited by capital or generation capacity, but by the grid itself.

• Infrastructure graduated from diversifier to core holding. KKR's 2026 Infrastructure Outlook frames private infrastructure as a core building block, not a portfolio hedge.

• Real estate is splitting into two markets. Data center commitments are surging while office continues to lag, turning one asset class into two distinct trades.

• Credit is starting to price the saturation risk. Diameter Capital's Scott Goodwin argued hyperscaler debt issuance will eventually crowd out other investment grade issuance.

By The Numbers:

• $10 trillion: scale of the AI infrastructure rewiring, per Fink and Flatt

• $106 trillion: projected global infrastructure investment need by 2040

• $2.3 trillion: already committed to data centers this year, per Barclays

• 2028: year hyperscaler debt issuance may hit a saturation point

Key Trends to Watch:

• Grid constraints move from talking point to covenant. Watch whether power availability starts showing up as an explicit underwriting term in private credit documentation rather than just commentary.

• Hyperscaler issuance volume tests the 2028 saturation call. If Goodwin's thesis holds, crowding out effects on investment grade issuance should already be visible at the margin well before then.

• Office either finds a floor or the bifurcation widens. H2 transaction volume will show whether office is stabilizing or whether capital keeps rotating entirely toward data centers.

• Insurance capital rotation compresses infrastructure spreads further. Continued permanent capital inflows from platforms like Apollo and KKR would tighten already scarce infrastructure debt pricing.

The Wrap: 

AI's balance sheet is being built in private markets, not public ones. The firms that own the physical layer, the power, the grid, the concrete, will collect rent on this cycle regardless of which model wins the software race above them.