NEW YORK, March 28 - Moody's Investors Service has placed Ukraine's key sovereign ratings on review for possible upgrade, including the foreign-currency ceilings for bonds and bank deposits, which are Ba3 and B2, respectively, and the B1 foreign- and local-currency government bond ratings.

These ratings have carried a positive outlook since November 2006.

The Baa1 local currency country ceiling and A3 bank deposit ceiling are affirmed with a stable outlook. Also unaffected are the short-term country ceilings at Not Prime.