MILAN (Reuters) - UBS (>> UBS Group AG) more than halved its stake in Banca Carige (>> Banca Carige SpA) on Monday, the same day that shares in the Italian mid-sized bank plunged 13.6 percent, a regulatory filing showed.

Market regulator Consob said on its website on Friday the Swiss bank held 1.4 percent of Carige as of Jan. 11, down from 3.8 percent back on Sept. 29 when its holding was last updated.

Carige and Monte dei Paschi (>> Banca Monte dei Paschi di Siena SpA) dragged Italian banking stocks lower on Monday as investors fretted about bad loans and capital levels at the two lenders.

(Reporting by Francesca Landini, editing by Valentina Za)