Legal Opinion 

An opinion concerning the validity of a securities issue with respect to statutory authority, constitutionality, procedural conformity and usually the exemption of interest from federal income taxes. The legal opinion is usually rendered by a law firm recognized as specializing in public borrowings, often referred to as bond counsel.

Remarks: Bond funds including mutual funds (open-end and closed-end, actively managed and indexed), exchange-traded funds and unit investment trusts offer a convenient and affordable way to invest in a diversified portfolio of bonds, but a bond fund investment can differ from a bond investment in ways that are important to understand.