JGB yields with super-long maturities jump ahead of auction

TOKYO, April 21 (Reuters) - Yields on Japanese government bonds (JGBs) with super-long maturities jumped on Monday as investors turned cautious about a liquidity-enhancing auction in the next session, which will gauge the demand for such bonds.

The 20-year JGB yield JP20YTN=JBTC rose 3 basis points to 2.275%. The 30-year JGB yield JP30YTN=JBTC rose 5 basis points to 2.76%.

"If the market witnesses a positive outcome from the liquidity-enhancing auction, investors will be encouraged to buy bonds with super-long maturities," said Naoya Hasegawa, chief bond strategist at Okasan Securities.

"The JGBs with those maturities have become cheap now as they were sold off heavily amid high volatilities in bond prices."

Japan's finance ministry on Tuesday will hold the auction for the bonds with maturities left between 15.5 years and 39 years.

The yield on 30-year JGBs surged to a 21-year high earlier this month, following a surge in U.S. Treasury yields as investors tried to cash in on a market rout caused by worries about the impact of the U.S. tariffs.

The 10-year JGB yield JP10YTN=JBTC rose 0.5 bp to 1.29%.

The five-year yield JP5YTN=JBTC rose 1 bp to 0.845% and the two-year JGB yield JP2YTN=JBTC rose 0.5 bp to 0.635%.