Agency Bonds

What Are Agency Bonds?

Agency bonds are debt securities issued by government-sponsored enterprises (GSEs) or federal government agencies. These entities were created by Congress to channel credit toward specific economic sectors, primarily housing and agriculture. The bonds fund the operations of these entities and finance the mortgage and lending markets they support.

The largest agency bond issuers are Fannie Mae, Freddie Mac, and the Federal Home Loan Banks. Together, they account for trillions of dollars in outstanding debt. Agency bonds come in various structures, including fixed-rate, floating-rate, callable, and step-up coupon varieties.

Why It Matters for Markets

Agency bonds occupy a unique space between Treasuries and corporate bonds on the risk-return spectrum. They offer higher yields than Treasuries while maintaining a credit profile that most investors consider nearly risk-free, given the implicit government support for GSEs.

The agency bond market is deeply connected to the U.S. housing market. When the housing market is strong and mortgage origination is high, GSEs issue more debt to fund their operations. The yield spread between agency bonds and Treasuries reflects market perceptions of housing market risk and the strength of the implied government guarantee.

During the 2008 financial crisis, agency spreads blew out as investors questioned whether the government would stand behind GSE debt. The subsequent conservatorship of Fannie Mae and Freddie Mac, along with Treasury support, ultimately compressed spreads back toward normal levels and reinforced the market's belief in the implicit guarantee.

Investing in Agency Bonds

Agency bonds are available through brokers, banks, and some are offered directly through the issuing agency. They typically trade with minimum denominations of $1,000 to $10,000. Liquidity is generally good for benchmark issues but can be thinner for smaller or more complex structures.

Callable agency bonds are particularly common. These give the issuer the right to redeem the bond before maturity, usually when interest rates have fallen. This call risk means investors may have their bonds redeemed just when reinvestment opportunities are least attractive. Investors should compare the yield-to-call with the yield-to-maturity when evaluating callable agency bonds.