NEW YORK, June 16 (Reuters) - The U.S. Treasury's sale

of $13 billion in 20-year bonds showed solid demand on Monday in

line with last week's 10-year and 30-year debt auctions that

were also well-received.

The auction priced at a high yield of 4.942%, lower than the

market's rate forecast in when-issued trading at the bid

deadline.

The 20-year yield rose slightly to 4.94

following the auction, from 4.933% just before.