JGBs post modest gains on central bank bond-buying operation

TOKYO, Aug 17 (Reuters) - Japanese government bond prices rose modestly on Friday, helped by a regular debt-buying operation conducted by the central bank.

The two-year JGB yield fell half a basis point to minus 0.130 percent.

The 10-year yield was flat at 0.095 percent, while the 30-year yield declined half a basis point to 0.840 percent.

The Bank of Japan on Friday offered to buy 550 billion yen ($4.96 billion) of one- to five-year JGBs.

Demand for safe-haven bonds was limited by an improvement in broader investor risk appetite. The Nikkei gained 0.4 percent as U.S.-China trade concerns showed signs of easing.

($1 = 110.8500 yen) (Reporting by the Tokyo markets team; Editing by Vyas Mohan)