"The government may not want to lock in for a long period of time at a high interest rate should interest rates be lower in the future," the official said.
Secondary bond yields have fallen about 1.
5 percentage points after last month's devastating tsunami on expectations that donor aid inflows will boost reconstruction, making it easier for the central bank to issue bonds with a longer-term maturity.
The bond issue would stimulate trading in longer-term bonds, he said.
buy xenical online buy xenical online no prescription
The central bank currently auctions treasury bills and bonds with a tenure of up to four years.
The official said the public debt department may offer bonds with maturities longer than five years depending on the response to Friday's auction.
The central bank will also sell four-year bonds Friday. (Dow Jones)