What it is
An asset quality review (AQR) is a detailed, point-in-time examination of whether the assets on a bank's balance sheet are valued correctly. It tests the classification of loans, the adequacy of provisions against them, the valuation of collateral and of complex or illiquid instruments, and the appropriateness of the accounting treatment applied. The output is an adjusted view of asset values and, where necessary, of the bank's capital position. The AQR is the balance-sheet half of the ECB's comprehensive assessment; the other half is the stress test.
Why it matters
The rationale for an AQR is that reported capital is only as reliable as the asset values it is measured against. If loans that are in fact impaired are carried at par, or if collateral is valued optimistically, a bank can appear adequately capitalised while carrying unrecognised losses. By applying harmonised definitions and independent scrutiny, an AQR aims to strip out this optimism and put balance sheets on a comparable footing. This was a central purpose of the 2014 exercise, where divergent national provisioning practices had made cross-border comparison difficult.
How it works
An AQR typically proceeds through selected portfolios rather than every exposure. Supervisors and appointed third parties review samples of credit files, re-perform the classification of exposures against harmonised criteria (for example on what counts as non-performing), reassess collateral values, and check the level of provisions. Findings are aggregated into adjustments to carrying values, which flow through to a revised capital figure. That revised figure then becomes the starting point for the stress test within the comprehensive assessment.
Where the review identifies a capital shortfall, the bank is required to remediate it — usually by raising capital or reducing risk — within a defined timeframe. Because the AQR is an operational supervisory exercise defined by ECB methodology, it does not correspond to a dedicated article of legislation; it derives from the ECB's supervisory powers under the SSM framework.
Legal basis
The AQR has no free-standing legal article. It is conducted as the balance-sheet element of a comprehensive assessment, which the ECB may carry out under the SSM Regulation before assuming direct supervision of an institution. The methodology, sampling approach and thresholds are set out in ECB guidance rather than in primary law, so citations should be anchored coarsely on the comprehensive-assessment power.
Relevance for resolution and investors
An AQR is a going-concern supervisory tool, but its logic overlaps closely with resolution. Both require an honest, independent valuation of assets: the AQR to determine whether a supervised bank is adequately capitalised, and valuation in resolution to determine losses and the terms of any bail-in. A rigorous AQR reduces the risk that losses concealed on the balance sheet only surface once a bank is failing.
For investors, AQR outcomes can be material. Adjustments can convert an apparently comfortable capital ratio into a shortfall requiring dilutive capital raising, and the exercise produces detailed portfolio-level information on asset quality that is otherwise difficult for creditors to obtain.