Fixed Income Investments: Bond vs. Bill vs. Note

📌 "Not all government debt is the same." Bonds, Bills, and Notes are the three pillars of fixed income investing, each serving a unique role in a portfolio based on time and risk.

When you lend money to the government by buying its debt, you get a fixed-income security. The three main types are Treasury Bonds, Treasury Bills, and Treasury Notes. Their core difference is the length of time until they mature. This maturity directly affects their price, interest payments, and risk profile.

1. Treasury Bill (T-Bill)

A Treasury Bill is a short-term debt security. It is sold at a discount and matures at its full face value. You do not receive regular interest payments; your profit is the difference between the purchase price and the face value.

Example 1 Buying a T-Bill

You buy a 6-month T-Bill with a face value of $1,000 for $980. After 6 months, the government pays you $1,000. Your profit is $20.

🔍 Explanation: The $20 profit is your interest, earned upfront because you paid less than the face value. This is called a discount security.

Example 2 T-Bill Maturity

Common T-Bill maturities are 4 weeks, 8 weeks, 13 weeks (3 months), 26 weeks (6 months), and 52 weeks (1 year). A 4-week T-Bill is for very short-term cash management.

🔍 Explanation: Shorter maturities mean less risk from interest rate changes. A 4-week T-Bill is one of the safest, most liquid investments available.

2. Treasury Note (T-Note)

A Treasury Note is a medium-term debt security. It pays a fixed interest rate every six months and returns the face value at maturity. Notes fill the gap between short-term Bills and long-term Bonds.

Example 1 Buying a T-Note

You buy a 10-year T-Note with a face value of $1,000 and a 3% coupon rate. Every six months, you receive $15 ($1,000 * 3% / 2). After 10 years, you get your $1,000 back.

🔍 Explanation: You get regular income (coupon payments) and your principal back at the end. The price of the Note can fluctuate in the market before maturity if interest rates change.

Example 2 Note Maturity

T-Note maturities are 2, 3, 5, 7, and 10 years. A 2-year Note is often used by investors who want slightly higher yield than a Bill but don't want to lock money for a long time.

🔍 Explanation: The 2-10 year range is the "belly" of the yield curve. These securities are sensitive to economic expectations and central bank policy changes.

3. Treasury Bond (T-Bond)

A Treasury Bond is a long-term debt security. Like a Note, it pays semi-annual interest, but it has the longest maturity. Bonds are for investors with a very long time horizon.

Example 1 Buying a T-Bond

You buy a 30-year T-Bond with a face value of $10,000 and a 4% coupon rate. Every six months, you receive $200 ($10,000 * 4% / 2). After 30 years, you get your $10,000 back.

🔍 Explanation: Bonds provide the highest regular income of the three but carry the most interest rate risk. If market rates rise, the market value of your 4% Bond falls more sharply than a shorter-term Note.

Example 2 Bond Use Case

A pension fund might buy 30-year Bonds to match its long-term payment obligations to retirees 30 years from now.

🔍 Explanation: The long, predictable cash flow from Bonds makes them ideal for matching long-term liabilities. This is called liability-driven investing.

Comparison Table

Bond vs. Bill vs. Note: Key Differences
Feature	Treasury Bill (T-Bill)	Treasury Note (T-Note)	Treasury Bond (T-Bond)
Maturity	1 year or less	2 to 10 years	20 to 30 years
Interest Payments	None (sold at discount)	Semi-annual	Semi-annual
Primary Risk	Very low (reinvestment risk)	Moderate (interest rate risk)	High (interest rate risk)
Typical Investor	Corporations, money market funds	Individual investors, banks	Pension funds, insurance companies
Price Volatility	Lowest	Medium	Highest

⚠️ Common Pitfalls & Confusions

"Bill" means no coupon: A T-Bill never pays periodic interest. Your return is purely the discount at purchase. Do not expect semi-annual payments.
"Note" and "Bond" are not just about length: While maturity is the main differentiator, the market often treats the 10-year Note as the benchmark for all long-term rates, blurring the line with Bonds.
Interest rate risk increases with maturity: A 30-year Bond's market price will swing much more than a 2-year Note's if interest rates change by 1%. Longer maturity = higher sensitivity.

Summary & Key Takeaway

Choose based on your time horizon and risk tolerance.

Use T-Bills for parking cash short-term (under 1 year) with maximum safety and liquidity.
Use T-Notes for a balanced approach (2-10 years) to earn steady income with moderate risk.
Use T-Bonds for long-term, income-focused goals (20-30 years) if you can tolerate price volatility.

The U.S. government guarantees all three, so credit risk (default risk) is virtually zero. Your main risk is interest rate movements affecting the market price before maturity.