Government Agency Securities

Government agency securities represent debt instruments issued by U.S. government-sponsored enterprises (GSEs) or federal agencies that support specific sectors of the economy, primarily housing and agriculture. These securities carry an implicit but not explicit government guarantee (except for GNMA), making them slightly riskier than U.S. Treasuries but still highly safe and liquid investments commonly tested on the exam.

Core Concepts

Types of Government Agency Issuers

Government agency securities fall into two main categories: federally-related institutions and government-sponsored enterprises (GSEs).

Federally-related institutions are actual arms of the U.S. government. Only one matters for the exam: the Government National Mortgage Association (GNMA or Ginnie Mae). GNMA securities are backed by the full faith and credit of the U.S. government, just like Treasury securities. They are the only agency securities with this explicit guarantee.

Government-sponsored enterprises are privately owned but government-chartered corporations created to improve credit flow to specific economic sectors. They do NOT carry the full faith and credit backing of the U.S. government-their backing is implicit only. The major GSEs tested include:

• Federal National Mortgage Association (FNMA or Fannie Mae) - purchases and securitizes conventional mortgages
• Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac) - purchases and securitizes conventional mortgages
• Federal Home Loan Banks (FHLB) - provides liquidity to member banks for housing finance
• Federal Farm Credit Banks (FFCB) - supports agricultural lending

When to Use This

• Exam questions asking which agency security carries explicit government backing always point to GNMA
• Questions contrasting safety levels between Treasuries and agencies: Treasuries are safest, followed by GNMA (equal safety to Treasuries due to backing), then other agencies
• If a question asks about mortgage-backed securities with government guarantee, choose GNMA over FNMA or FHLMC
• Questions about agricultural or farm lending point to Federal Farm Credit Banks

Backing and Credit Quality

The key distinction for the exam is understanding which agencies have explicit versus implicit backing.

Explicit backing (full faith and credit): Only GNMA securities carry this. The U.S. government guarantees timely payment of principal and interest. If borrowers default, the government covers losses. This makes GNMA securities equivalent in credit quality to U.S. Treasuries.

Implicit backing: FNMA, FHLMC, FHLB, and FFCB securities are NOT explicitly backed by the government. However, the market perceives strong government support due to their public purpose and history. During the 2008 financial crisis, the government placed FNMA and FHLMC into conservatorship, reinforcing this implicit backing. Because of this implicit (not explicit) guarantee, these securities carry slightly higher yields than Treasuries to compensate for the marginally higher risk.

When to Use This

• Questions comparing yields: Agency securities (except GNMA) yield more than Treasuries of similar maturity because of the credit risk difference
• If asked which security has no credit risk, choose Treasuries or GNMA-not FNMA or FHLMC
• Scenario questions about government bailouts or conservatorship refer to FNMA and FHLMC

Mortgage-Backed Securities (MBS)

GNMA, FNMA, and FHLMC issue mortgage-backed securities (MBS), which are pools of individual mortgages packaged and sold to investors. Investors receive monthly payments consisting of both principal and interest as homeowners make their mortgage payments.

Key characteristics for the exam:

• Pass-through securities: Agency MBS are typically pass-through structures where principal and interest payments "pass through" from borrowers to investors monthly
• Prepayment risk: Homeowners can refinance or pay off mortgages early, returning principal to investors sooner than expected. This forces investors to reinvest at potentially lower rates, creating prepayment risk
• Monthly payments: Unlike Treasuries (which pay semiannually) or corporate bonds, MBS pay monthly because mortgages are paid monthly
• Minimum denominations: Agency MBS typically have higher minimum purchases than Treasuries-often $25,000 versus $100 for Treasuries
• Average life versus maturity: MBS don't have a fixed maturity date due to prepayments; instead, they have an estimated "average life" based on prepayment assumptions

When to Use This

• Questions about monthly income point to mortgage-backed securities, not Treasuries or corporate bonds
• If asked about prepayment risk or reinvestment risk from early principal return, choose MBS
• Questions contrasting predictable maturity (Treasuries) versus uncertain maturity (MBS due to prepayments) point to MBS characteristics
• When comparing payment frequency: MBS pay monthly, Treasuries pay semiannually

Tax Treatment

Agency securities have specific tax treatment that differs from Treasuries and municipal bonds.

Federal taxation: Interest income from all agency securities is subject to federal income tax.

State and local taxation: This is where differences emerge. Interest from GNMA, FNMA, and FHLMC is generally subject to state and local taxes. However, interest from Federal Farm Credit Banks and Federal Home Loan Banks may be exempt from state and local taxes depending on the state. For exam purposes, remember that agency securities do NOT receive the same state/local tax exemption that U.S. Treasury securities receive.

Compare this to Treasuries, which are exempt from state and local taxes, and municipal bonds, which are exempt from federal taxes (and sometimes state/local taxes if issued in-state).

When to Use This

• Questions asking which securities are exempt from state/local taxes: Treasuries yes, most agency securities no
• If comparing tax-equivalent yields, remember agency securities don't have the state/local tax advantage of Treasuries
• Questions about triple-tax-exempt securities never refer to agency securities (those are municipal bonds issued in-state)

Interest Rate Risk and Duration

Like all fixed-income securities, agency securities experience interest rate risk-when market interest rates rise, bond prices fall, and vice versa. Longer-term agency securities have greater price volatility than shorter-term issues.

For mortgage-backed securities specifically, interest rate movements create complex price behavior:

• When rates fall: Homeowners refinance, accelerating prepayments. This returns principal early, limiting price appreciation compared to non-callable bonds
• When rates rise: Prepayments slow as homeowners keep their low-rate mortgages. The MBS behaves more like a longer-term bond, experiencing greater price declines

This asymmetric price behavior is called negative convexity. For exam purposes, understand that MBS have prepayment risk that limits upside when rates fall but doesn't protect the downside when rates rise.

When to Use This

• Questions about which security has prepayment risk accelerating when rates fall point to MBS
• If asked which security underperforms in a declining rate environment due to early principal return, choose MBS
• Questions contrasting simple interest rate risk (Treasuries) versus complex prepayment-driven price behavior (MBS)

Liquidity and Marketability

Agency securities are highly liquid but not quite as liquid as U.S. Treasuries. The secondary market for FNMA and FHLMC securities is deep and active, making them easy to buy and sell. GNMA securities are also highly liquid due to their government backing.

Key points:

• Agency securities have narrower bid-ask spreads than corporate bonds but wider spreads than Treasuries
• Large institutional investors dominate the agency market; retail participation is lower than in the Treasury market
• During market stress, agency securities remain relatively liquid compared to corporate or municipal bonds

When to Use This

• Questions ranking liquidity: Treasuries most liquid, then agency securities, then corporate/municipal bonds
• If a question asks about securities suitable for institutional portfolios needing higher yield than Treasuries with minimal credit risk, agencies are the answer

Commonly Tested Scenarios / Pitfalls

1. Scenario: A question asks which agency security has the same credit quality as U.S. Treasury securities. The choices include GNMA, FNMA, FHLMC, and FFCB.

Correct Approach: Choose GNMA (Ginnie Mae) because it's the only agency security backed by the full faith and credit of the U.S. government, making it equal in credit quality to Treasuries.

Check first: Identify which issuer has explicit government backing versus implicit backing-only GNMA has explicit backing.

Do NOT do first: Don't assume all government agencies have the same backing or that "government-sponsored" means government-guaranteed-GSEs like FNMA and FHLMC have only implicit support.

Why other options are wrong: FNMA, FHLMC, and FFCB are government-sponsored enterprises with implicit backing only, so they carry slightly higher credit risk and yield more than Treasuries to compensate.

2. Scenario: An investor wants monthly income and is comparing a Treasury note with an agency mortgage-backed security. The question asks which provides monthly payments.

Correct Approach: Choose the agency MBS (GNMA, FNMA, or FHLMC pass-through) because these securities pay monthly as homeowners make their mortgage payments.

Check first: Identify the payment frequency: MBS pay monthly, while Treasuries and most corporate bonds pay semiannually.

Do NOT do first: Don't confuse payment frequency with total return or yield-the question is specifically about payment timing, not amount.

Why other options are wrong: Treasury notes pay interest semiannually (every six months), not monthly, so they don't meet the investor's need for monthly income.

3. Scenario: A question describes a scenario where interest rates have fallen significantly, and asks which security type faces the greatest prepayment risk.

Correct Approach: Choose mortgage-backed securities (GNMA, FNMA, or FHLMC MBS) because homeowners refinance when rates drop, paying off mortgages early and returning principal to investors sooner than expected.

Check first: Determine which securities contain mortgages that borrowers can prepay without penalty-MBS have this characteristic, while most other bonds are non-callable or have call protection.

Do NOT do first: Don't select Treasury securities or non-callable corporate bonds-these don't have prepayment risk because they have fixed maturity dates and typically can't be prepaid by the issuer.

Why other options are wrong: Treasury securities and most non-callable bonds don't contain prepayable loans, so falling rates simply increase their market value without returning principal early.

4. Scenario: An exam question asks which mortgage-backed security securitizes conventional (non-government-insured) mortgages rather than FHA or VA loans.

Correct Approach: Choose FNMA (Fannie Mae) or FHLMC (Freddie Mac)-both purchase and securitize conventional mortgages from the private market.

Check first: Identify what type of mortgages each agency handles: GNMA securitizes government-insured mortgages (FHA, VA), while FNMA and FHLMC handle conventional mortgages.

Do NOT do first: Don't select GNMA thinking it covers all mortgage types-GNMA only deals with government-backed mortgages like FHA and VA loans.

Why other options are wrong: GNMA securities contain only government-insured or government-guaranteed mortgages (FHA, VA, USDA), not conventional mortgages, which are the domain of FNMA and FHLMC.

5. Scenario: A question compares state and local tax treatment, asking which securities are exempt from state and local taxes.

Correct Approach: Choose U.S. Treasury securities-these are the only ones fully exempt from state and local taxes. Agency securities (GNMA, FNMA, FHLMC) are generally subject to all taxes.

Check first: Distinguish between Treasuries (exempt from state/local tax) and agency securities (generally not exempt from state/local tax).

Do NOT do first: Don't assume that because agencies are government-related, they receive the same tax treatment as Treasuries-they don't.

Why other options are wrong: Agency securities like GNMA, FNMA, and FHLMC are taxable at federal, state, and local levels, unlike Treasuries which escape state and local taxation.

Step-by-Step Procedures or Methods

Task: Determining which agency security to recommend based on client needs

1. Identify the client's primary objective: safety, yield, income frequency, or tax considerations
2. If safety is paramount and the client wants government-guaranteed securities, select GNMA (equivalent to Treasuries in credit quality)
3. If the client needs higher yield than Treasuries while accepting slightly higher credit risk, select FNMA or FHLMC (GSEs with implicit backing)
4. If the client requires monthly income, select agency MBS (GNMA, FNMA, or FHLMC pass-throughs) since they pay monthly versus semiannual Treasury payments
5. If prepayment risk is a concern (client wants predictable maturity), avoid MBS and recommend Treasury securities or non-MBS agency debt
6. If state/local tax exemption is important, recommend Treasuries over agency securities, as most agencies don't offer this exemption
7. Consider liquidity needs: both Treasuries and agency securities are highly liquid, but Treasuries have slightly tighter bid-ask spreads

Task: Comparing yield and credit characteristics of government securities

1. Rank securities by credit quality from highest to lowest: U.S. Treasuries and GNMA (tied for highest), then FNMA/FHLMC/FHLB/FFCB (slightly lower), then corporate bonds
2. Rank securities by yield from lowest to highest (inverse of credit quality): Treasuries and GNMA yield least, then other agency securities, then corporate bonds yield most
3. Determine which securities have explicit government backing: only Treasuries and GNMA
4. Determine which have implicit government backing: FNMA, FHLMC, FHLB, FFCB
5. Remember that higher yield compensates for higher risk-if an agency security yields more than a Treasury of similar maturity, it's because of credit risk, not government backing
6. Apply this ranking to exam questions asking about yield spreads, safety comparisons, or credit risk

Practice Questions

Q1: Which of the following agency securities is backed by the full faith and credit of the U.S. government?
(a) Federal National Mortgage Association (FNMA)
(b) Government National Mortgage Association (GNMA)
(c) Federal Home Loan Mortgage Corporation (FHLMC)
(d) Federal Farm Credit Banks (FFCB)

Ans: (b)
GNMA (Ginnie Mae) is the only agency security with explicit government backing-it carries the full faith and credit of the U.S. government. FNMA, FHLMC, and FFCB are government-sponsored enterprises with only implicit backing, meaning the government does not explicitly guarantee their debt.

Q2: An investor holding mortgage-backed securities issued by FNMA is most exposed to which of the following risks when interest rates decline?
(a) Default risk
(b) Prepayment risk
(c) Inflation risk
(d) Liquidity risk

Ans: (b)
When interest rates decline, homeowners refinance their mortgages at lower rates, causing prepayments to accelerate. This returns principal to investors earlier than expected, forcing them to reinvest at lower prevailing rates. Default risk is minimal with FNMA securities, inflation risk exists but isn't heightened by falling rates, and FNMA securities remain highly liquid.

Q3: Compared to U.S. Treasury securities with similar maturities, agency securities issued by FNMA and FHLMC typically offer:
(a) Lower yields due to explicit government backing
(b) Higher yields due to implicit rather than explicit government backing
(c) The same yield since both are government-related
(d) Lower yields due to superior liquidity

Ans: (b)
FNMA and FHLMC securities offer higher yields than Treasuries because they carry slightly higher credit risk-they have implicit government backing only, not the explicit full faith and credit guarantee of Treasuries. Investors demand this yield premium to compensate for the marginally higher risk. They are not as safe as Treasuries and don't have superior liquidity.

Q4: Which statement about the tax treatment of agency securities is correct?
(a) Interest from GNMA securities is exempt from federal income tax
(b) Interest from FNMA securities is generally exempt from state and local taxes
(c) Interest from agency securities is subject to federal income tax
(d) Interest from FHLMC securities receives the same tax treatment as municipal bonds

Ans: (c)
Interest income from all agency securities is subject to federal income tax. Unlike U.S. Treasuries (which are exempt from state/local taxes) or municipal bonds (which are often exempt from federal taxes), agency securities are generally taxable at all levels-federal, state, and local. This is an important distinction for exam questions comparing tax treatment across government securities.

Q5: An investor receives monthly payments consisting of both principal and interest from a security. This security is most likely:
(a) A U.S. Treasury note
(b) A corporate bond
(c) A mortgage-backed security
(d) A municipal bond

Ans: (c)
Mortgage-backed securities (issued by GNMA, FNMA, or FHLMC) make monthly payments of both principal and interest as homeowners pay their mortgages. Treasury notes pay semiannually (interest only until maturity), and corporate and municipal bonds typically also pay semiannually. Monthly payment frequency is a defining characteristic of MBS pass-through securities.

Q6: A conservative investor seeking government-guaranteed mortgage-backed securities should purchase:
(a) FNMA pass-through certificates
(b) FHLMC participation certificates
(c) GNMA modified pass-through certificates
(d) Private-label mortgage-backed securities

Ans: (c)
GNMA (Ginnie Mae) securities are the only mortgage-backed securities backed by the full faith and credit of the U.S. government, making them truly government-guaranteed. FNMA and FHLMC securities have only implicit government support (not explicit guarantees), and private-label MBS have no government backing at all. For a conservative investor requiring government guarantee, GNMA is the only correct choice.

Quick Review

• GNMA (Ginnie Mae) is the only agency security with explicit government backing-full faith and credit of the U.S., equal to Treasuries in credit quality
• FNMA (Fannie Mae), FHLMC (Freddie Mac), FHLB, and FFCB are GSEs with implicit backing only-they yield more than Treasuries to compensate for slightly higher risk
• Agency MBS pay monthly (principal and interest), while Treasuries and most bonds pay semiannually
• Prepayment risk is highest in MBS when interest rates fall because homeowners refinance, returning principal early
• GNMA securitizes government-insured mortgages (FHA, VA); FNMA and FHLMC securitize conventional mortgages
• Interest from agency securities is taxable at federal, state, and local levels-they don't get the state/local exemption that Treasuries receive
• Agency securities are highly liquid but not quite as liquid as U.S. Treasuries-narrower spreads than corporates but wider than Treasuries
• Negative convexity in MBS means limited price appreciation when rates fall (due to prepayments) but full price decline when rates rise
• Higher minimum denominations for agency MBS (often $25,000) compared to Treasuries ($100 minimum)
• MBS have average life (estimated) rather than fixed maturity due to uncertain prepayment timing