Fed Rate Hike Deepens Private Equity's Zombie Fund Crisis

The Federal Reserve's September 2026 quarter-point rate hike — its first in three years — has delivered a fresh blow to an already battered private equity industry, threatening to expand a record $349 billion pile of capital trapped in so-called zombie funds. These are funds that have blown past their 10-year return windows without successfully exiting investments, leaving pension funds, insurers, and endowments unable to recoup their money. That figure, already up 65% from end-2021 to end-2025 per PitchBook data, is now widely expected to climb further as deal activity freezes again.

The rate environment upends private equity's core business model: firms borrow heavily to buy companies, then sell them at a profit within a decade. Rising rates simultaneously squeeze portfolio companies' loan costs and deter potential buyers who face their own higher borrowing costs. Deal activity had briefly revived in 2025 when rates dipped, raising hopes for a strong 2026 — those hopes have now evaporated. Roughly $500 billion in funds aged seven to ten years are now at risk of sliding into zombie status as well. Industry fundraising has cratered to $211.9 billion through mid-September 2026, on pace for the worst year since at least 2020, down sharply from $334.4 billion in all of 2025 and $376.9 billion the year before.

Software investments are a second front of pain. Private equity deployed an average 14% of capital into software companies during the low-rate bonanza of 2020-2021, and artificial intelligence is now disrupting those business models. Thoma Bravo lost a $5 billion investment in customer-service software firm Medallia after it defaulted this year, with lenders seizing control. The firm is simultaneously in restructuring talks with debt holders for other portfolio companies including cybersecurity firm Sophos. Clearlake Capital, which grew from $8 billion to $185 billion in assets under management since 2017, is seeing lenders mark down loans to HR software maker Cornerstone OnDemand (a $2.1 billion loan) and healthcare software firm Symplr Software (roughly $1.5 billion) by more than 30%, with the firm in active discussions on both.

The fallout is feeding a compounding cycle: weak returns make institutional investors reluctant to commit to new funds, shrinking the fee income that sustains private equity firms. Average industry returns hit just 7% in 2025 — the worst since 2011 despite a healthy U.S. economy. Apollo Global Management's co-president Scott Kleinman acknowledged publicly that some managers who expanded rapidly over the past decade will be forced to shrink. Former Alaska Permanent Fund CEO Angela Rodell warned that investors will increasingly limit re-commitments to only their most trusted relationships, and that some fund managers will close entirely. Loan defaults are expected to accelerate in 2027 and 2028 as buyout debt from the 2020-2021 vintage comes due.