Private Credit / Shadow Banking

Private credit's rise makes sense on paper. After 2008, banks faced tighter capital rules and pulled back from middle-market leveraged lending. Private equity sponsors needed financing. Institutional investors—pensions, insurers, endowments—wanted yield that didn't live in the public high-yield market. Non-bank lenders stepped in with bilateral loans, often floating-rate, often with more flexible structures than a broadly syndicated deal.

That story is real. So is the size. The IMF's April 2024 Global Financial Stability Report put the market at roughly $2.1 trillion in assets and committed capital, with about three-quarters in the United States. AIMA's Financing the Economy 2025 work estimated global private credit AUM near $3.5 trillion by end-2024. The FSB's 2026 vulnerability report, drawing on member data, put outstanding private credit in a $1.5–2.0 trillion band—already comparable to the institutional leveraged-loan market. Definitions differ, which is itself a tell: when you can't agree on the denominator, opacity is part of the product.

The bubble case is not that private credit is fake. It's that the boom has outrun the market's ability to show stress clearly.

Start with borrowers. Private credit companies tend to be smaller and more levered than public-bond peers. The IMF noted that more than a third of firms with private-credit-like size and leverage had interest costs exceeding earnings after the rate shock. Floating-rate loans transmit higher policy rates quickly. One response has been payment-in-kind (PIK): instead of cash interest, the unpaid coupon compounds into the loan balance. In BDCs, the share of interest income coming from PIK roughly doubled since 2019 to around 9% in IMF figures; some portfolios have seen far higher PIK shares. PIK can be a bridge. It can also be a way to defer the moment when a loan is recognized as broken.

Then there's valuation. Private loans rarely trade. They're often marked to model with limited price discovery. That softens reported volatility in good times and can delay loss recognition in bad ones. Ratings are frequently private or absent; the FSB has flagged growing use of lesser-known private ratings to open doors for rating-reliant investors such as insurers. When prices don't move until they have to, stable NAVs can be a feature of the accounting, not proof of credit quality.

Competition is doing the usual late-cycle work. Dry powder rose sharply over the past decade. Managers have fixed fundraising clocks and return targets. Banks have come back into larger deals. The result, according to both the Fed and the IMF, is pressure on spreads, underwriting standards, and covenants—including more covenant-lite structures that look a lot like the public leveraged-loan market private credit once claimed to be stricter than. The Fed has also documented bank credit lines to private-credit vehicles growing from roughly $8 billion in early 2013 to about $95 billion by 2024-Q4. That is still small relative to the banking system, but it is the kind of plumbing that matters when funds need liquidity at the same time.

Liquidity mismatches are creeping in from another direction. Evergreen and retail-accessible private credit vehicles offer more frequent redemption features than classic closed-end funds. In a calm market that sells diversification. In a stressed market it can force sales or gates just when marks are least trustworthy.

None of this means the sector is worthless. Private credit finances real companies. Long-term capital reduces classic bank-style maturity transformation. Default rates have stayed relatively low through the first big hiking cycle—partly because lenders can amend and extend with a small creditor group. The industry has not yet been stress-tested at today's size in a deep recession.

That's the point of treating it as a bubble candidate. The danger isn't that every loan blows up tomorrow. It's that a large, opaque, interconnected credit system can look fine—until PIK stops being a temporary fix, until marks have to catch up with reality, until banks tighten lines, or until retail vehicles face redemption pressure. Useful credit can still be a bad investment if too much capital chased too little underwriting discipline at the wrong point in the rate cycle.