noun
debenture; bond
A financial instrument issued by a company; often used in legal and investment contexts.
その会社は新たに社債券を発行して資金を調達した。
The company raised funds by issuing new bonds.
債券 is a general term for bonds, including government and corporate bonds; 社債券 specifically refers to corporate bonds.
Compound of 社 (company) + 債券 (bond).