TOKYO, Aug 25 (Reuters) - Longer-dated Japanese government bond prices rose on Tuesday due to strong investor demand seen during the 20-year debt auction.
Benchmark 10-year JGB futures 2JGBv1 fell 0.11 point to 151.86, with a trading volume of 16,526 lots, while the 10-year JGB yield JP10YTN=JBTC edged up half a basis point to 0.025%.
At the shorter end of the yield curve, the five-year yield JP5YTN=JBTC rose half a basis point to minus 0.090%.
Tuesday's 1.2 trillion yen 20-year JGB auction drew solid investor interest, with the bid-to-cover ratio, a gauge of demand, rising to 3.92 from 3.80 at the previous auction in July.
In yet another sign of firm demand, the auction's tail, or the gap between the lowest and average prices, slightly tightened to 0.04 from the previous 0.05.
Following the auction result, the super-long zone moved in a different direction, with the 20-year JGB yield JP20YTN=JBTC falling half a basis point to 0.405%.
The 30-year JGB yield JP30YTN=JBTC lost 1 basis point to 0.590%, while the 40-year JGB yield JP40YTN=JBTC fell 1.5 basis points to 0.610%.
(Reporting by Tokyo Markets Team; Editing by Amy Caren Daniel)