noun
treasury bond
A bond issued by the national treasury; a formal financial term.
政府は国庫債権を発行して資金を調達した。
The government raised funds by issuing treasury bonds.
国債 is the more common general term for government bonds, while 国庫債権 specifically refers to bonds issued by the national treasury.
Compound of 国庫 (national treasury) and 債権 (bond, credit).