The friction centers on the inability of European supervisors to gain a "look-through" into the assets, funding, and valuation methods underpinning private credit vehicles. While European Central Bank data estimates euro zone bank exposure at roughly €62.5 billion, officials argue these aggregate figures mask deeper systemic vulnerabilities. Bundesbank board member Michael Theurer warned that the layering of collateralized loan obligations and leveraged lending creates an environment where risks are difficult to map, leaving regulators blind to how contagion might spread.

U.S. Treasury and Federal Reserve officials have largely declined to provide the granular information requested, citing strict legal confidentiality requirements and the potential for excessive bureaucratic burdens on firms. While the Federal Reserve has signaled it is refining its own reporting requirements for domestic banks, the U.S. stance remains that current bank exposures to non-bank lenders are well-collateralized. European policymakers, however, remain unconvinced by these assurances, suggesting that without greater visibility, they may be forced to unilaterally impose stricter capital requirements on the financial institutions they oversee to buffer against potential market shocks.