The issue was more than two times oversubscribed with bids totalling 68.2 million levs in par value at an average price of 77.33% of par, the Bulgarian National Bank (BNB) said in a statement.
The previous auction of 35 million levs worth of 10-year, fixed-rate Bulgarian T-notes held last month was almost 2.5 times oversubscribed.
Yields in Monday's auction were in line with dealers expectations of 7.3% to 7.5% on the average. Dealers have said they expected the issue to be oversubscribed two times.
The Treasury notes auctioned on Monday were the sixth and final batch of an up to 250 million lev issue of 10-year T-notes the Finance Ministry has planned to offer this year. Since the beginning of the year, the ministry has issued 200 million levs in 10-year government securities.
The issue bears an annual interest rate of 4.5%, with coupon payments due semi-annually and the last payment due at maturity, on January 16, 2018.
Monday's auction produced a maximum offered yield of 7.47% and a minimum offered yield of 7.10%. The lowest accepted price was 81.41 levs and the highest accepted price - 83.49 levs.
The BNB auctions government securities on behalf of the Finance Ministry.
(1 euro = 1.95583 Bulgarian levs)