June 6 (Reuters) - Ratings agency Moody's placed ratings

of six U.S regional banks on review for downgrade on Thursday

due to their substantial exposure to commercial real estate

loans.

The long term ratings of First Merchants Corp. ( FRME ), F.N.B.

Corp., Fulton Financial Corp. ( FULT ), Old National Bancorp ( ONB ),

Peapack-Gladstone Financial Corp. ( PGC ) and WaFd ( WAFD ) were placed on review

for downgrade.