TOKYO, July 27 (Reuters) - Japanese government bond yields edged up on Monday, the first trading session after a long weekend, as traders hedged positions ahead of Tuesday’s 40-year debt auction.
The 10-year JGB yield added half a basis point to 0.015%, while the benchmark 10-year JGB futures were down 0.04 point to 152.34, with a trading volume of 10,581 lots.
The 20-year JGB yield gained half a basis point to 0.410%, while the 30-year JGB yield was unchanged at 0.570%.
At the longer end of the market, the two-year JGB yield and the five-year yield inched up half a basis point each to minus 0.135% and minus 0.120%, respectively.
Bucking the trend, the 40-year JGB yield dipped half a basis point to 0.595%.
The Bank of Japan maintained the size of its JGB purchase on Monday and bought 10 to 25 year maturities worth 120 billion yen. (Reporting by Tokyo Markets Team)