|
|
The lenders are Italy's Banca Mediolanum, the Irish unit of U.S. lender Citigroup, Slovenia's Abanka and Latvia's Rietumu Banka.
The "comprehensive assessment" includes a review of the quality of the assets on the banks' balance sheet and a "stress test" checking their resilience to shocks, the ECB said.
Results are expected in November.
The ECB currently supervises the euro zone's 129 largest banks, based on their size in absolute terms and relative to the country where they are based.