A discount bond is a type of bond that is sold for less than its face value. When the bond matures, the investor receives its full face value, earning a return on the difference between the purchase price and the amount received at maturity.
This article explains what a discount bond is, its types, and its advantages and risks.
Key Takeaways
- A discount bond trades in the secondary market at a price below its face value.
- Primary price drivers include rising market interest rates, weak market demand, or issuer credit downgrades.
- Sovereign government bonds experience price movements primarily due to interest rate shifts, whereas corporate bonds fluctuate based on business fundamentals and credit risk.
- Yield to Maturity (YTM) provides the standard metric to assess whether a discounted bond's return adequately compensates for its risk profile.
- Examining issuer balance sheets and credit ratings is necessary before purchasing discounted corporate debt.
What is a Discount Bond?
A discount bond is a debt security that trades in the secondary market at a price lower than its face value (also known as par value). For example, if a corporate bond with a face value of ₹1,500 is available in the secondary market at ₹1,150, it is trading at a discount of ₹350.
Unlike equities, which derive their market valuation from growth expectations and earnings multiples, fixed-income securities are anchored to contractual cash flows and predetermined maturity values. When broader interest rates diverge from a bond's fixed coupon rate, or when the perceived creditworthiness of the issuing entity changes, market forces adjust the bond's trading price so that its yield aligns with prevailing market expectations.
How Discount Bonds Work
The valuation mechanism of a discount bond is fundamentally governed by the inverse relationship between market interest rates and bond prices.
Core Market Drivers
- Interest Rate Sensitivity: When the Reserve Bank of India (RBI) or central banks adjust monetary policy and push interest rates up, newly issued debt securities offer higher coupon rates. Consequently, older bonds carrying lower fixed coupon rates become less attractive to investors. To remain competitive, the market price of these existing bonds drops until their effective Yield to Maturity (YTM) equals current market yields.
- Credit Risk and Rating Revisions: Beyond broad rate movements, if credit rating agencies downgrade an issuer or if market sentiment reflects concerns about a company's financial stability, investors demand a higher yield to compensate for default risk. This higher yield is achieved through a lower purchase price in the secondary market.
- Maturity Convergence (Pull-to-Par): Regardless of whether a bond is bought at par, at a discount, or at a premium, the issuing entity is contractually obligated to repay the full face value upon maturity (assuming no default occurs). As a discount bond approaches its redemption date, its market price naturally trends upward to match its par value, a movement known as "pull-to-par".
- Proximity to Coupon Dates: A coupon-bearing bond's price typically creeps upward right before a scheduled interest payout date, as the buyer pays for the accrued interest. Once the payout is disbursed, the trading price adjusts downward accordingly.
How is Yield to Maturity (YTM) Calculated?
To understand how a lower purchase price translates into a higher return, consider a scenario where an investor purchases a corporate bond from the secondary market.
Example
An investor buys a listed corporate bond with a Face Value (FV) of ₹1,000 that matures in 1 year. The bond offers a fixed annual Coupon Rate of 8% (paying ₹80 annually). Because prevailing interest rates for similar risk-profile bonds have risen to 10%, the market price of this bond drops to a Discounted Price (P) of ₹981.82.
Calculation Walkthrough
The Yield to Maturity (YTM) approximates the total return earned by holding the bond until maturity, combining periodic coupon income with capital appreciation upon redemption.
Formula:
Approximate YTM = (2FV + P)C + (NFV − P)
Where:
- C = Annual coupon payment (₹80)
- FV = Face value of the bond (₹1,000)
- P = Current market purchase price (₹981.82)
- N = Years to maturity (1 year)
Step-by-Step Calculation:
- Capital Gain Component: 11000 − 981.82 = ₹18.18
- Total Annual Return: 80 + 18.18 = ₹98.18
- Average Investment Value: 21000 + 981.82 = ₹990.91
- Yield to Maturity: 990.91 / 98.18 = 9.91%
The investor locks in an effective yield of approximately 9.91%, aligning the bond's total return with current market requirements despite its lower 8% coupon rate.
Discount vs. Par vs. Premium Bonds
Bonds are categorized into three pricing states in the secondary market based on how their current price compares to face value and stated coupon:
|
Parameter |
Discount Bond |
Par Bond |
Premium Bond |
|
Price vs Face Value |
Traded price is lower than face value (Price < FV) |
Traded price equals face value (Price = FV) |
Traded price is higher than face value (Price > FV) |
|
Coupon vs Market Yield |
Stated Coupon Rate < Current Market Yield (YTM) |
Stated Coupon Rate = Current Market Yield (YTM) |
Stated Coupon Rate > Current Market Yield (YTM) |
|
Primary Market Driver |
Rising interest rates or credit rating downgrades |
Market interest rates match stated coupon rate |
Falling interest rates or credit rating upgrades |
|
Yield Return Profile |
Yield to Maturity is higher than stated coupon rate |
Yield to Maturity equals stated coupon rate |
Yield to Maturity is lower than stated coupon rate |
|
Market Perception |
Offers potential capital gain at maturity; requires risk evaluation |
Standard market pricing; minimal price distortion |
Perceived as lower risk or offering above-market regular income |
Types of Discount Bonds
Discount bonds are structured in two primary formats based on cash flow mechanics:
-
Traditional Coupon-Bearing Discount Bonds: Standard fixed-income instruments issued with a fixed coupon rate. While originally sold at or near par value, subsequent interest rate hikes or credit quality adjustments cause them to trade at a discount in the secondary market. Investors receive periodic interest payouts (annual or semi-annual) throughout the tenure, plus the full face value at maturity.
-
Zero-Coupon Bonds (Pure Discount Bonds): Instruments that make no periodic interest payouts during their tenure. Instead, they are issued at a steep discount to face value. The total investor return is derived entirely from the difference between the discounted purchase price and the full face value repaid at maturity.
Advantages of Discount Bonds
-
Capital Appreciation Potential: Investors can lock in capital appreciation equivalent to the difference between the discounted purchase price and the face value received at maturity.
-
Higher Yield to Maturity (YTM): Because the entry price is lower than the redemption value, the annualised YTM exceeds the bond's stated coupon rate.
-
Predictable Cash Flow (Coupon-Bearing Types): Non-zero-coupon discount bonds continue to provide regular periodic coupon payouts while trading at a reduced entry cost.
-
Seniority in Capital Structure: As debt obligations, bonds occupy a senior position over preferred and common equity shareholders during financial liquidation or corporate restructuring.
Risks Associated with Discount Bonds
-
Credit and Default Risk: A steep discount driven by credit downgrades signals financial distress or heightened insolvency risk. If the issuing entity defaults, investors may lose interest payouts and principal repayment.
-
Interest Rate Risk: Selling a discount bond in the secondary market before maturity during a continuing rate-hike cycle can lead to capital losses.
-
Reinvestment Risk: Periodic coupon payouts received from traditional discount bonds must be reinvested at prevailing market rates, which may be lower during future economic downturns.
-
Liquidity Risk: Deeply discounted corporate debt securities may suffer from lower trading volume in secondary markets, making it difficult to exit positions quickly at fair values prior to maturity.
Investor Evaluation Checklist
Before allocating capital to a discounted debt security, consider these analytical steps:
-
Calculate Yield to Maturity (YTM): Evaluate YTM to capture the total annualised return, combining the purchase price, remaining coupon payments, time to maturity, and face value repayment, and compare it against benchmark yields.
-
Examine Issuer Balance Sheet: Review the issuing company's debt-to-equity ratio, free cash flows, interest coverage ratio, and operational stability.
-
Analyse Peer and Sector Spreads: Compare the issuer's yield spread against direct industry peers to determine whether the discount stems from broader market conditions or issuer-specific weakness.
-
Monitor Credit Ratings: Check recent rating reports and outlook updates from recognised agencies such as CRISIL, ICRA, CARE, or Fitch to track default risk trends.
Taxation of Discount Bonds in India
Taxation of discount bonds in India depends on the bond structure, holding period, and transaction method under the Income Tax Act, 1961:
-
Periodic Coupon Payouts: Interest income received from traditional discount bonds is classified under "Income from Other Sources" and taxed at the investor's applicable income tax slab rates.
-
Secondary Market Capital Gains:
-
Listed Corporate Bonds: If held for more than 12 months before sale in the secondary market, profits are classified as Long-Term Capital Gains (LTCG) and taxed at 12.5% without indexation benefits. If held for 12 months or less, profits are treated as Short-Term Capital Gains (STCG) and taxed at applicable slab rates.
-
Unlisted Bonds: The holding period threshold for LTCG classification is 24 months.
-
Zero-Coupon Bonds:
-
Notified Zero-Coupon Bonds (Section 2(48)): Specified bonds notified by the Central Government are treated as capital assets. The difference between the issue/purchase price and maturity value is taxed as capital gains (LTCG at 12.5% if held for over 12 months; STCG at slab rates if held for 12 months or less) upon redemption or transfer.
-
Non-Notified Deep Discount Bonds: Income is treated as interest income accrued over the tenure under Central Board of Direct Taxes (CBDT) circular guidelines and taxed at the investor's applicable slab rates.
Conclusion
Discount bonds offer investors an opportunity to secure higher effective yields and potential capital appreciation, but evaluating them requires looking beyond the lower purchase price. While price adjustments caused by macroeconomic interest rate cycles represent standard secondary market mechanics, steep discounts linked to an issuer's deteriorating balance sheet carry real credit and default risks. By calculating Yield to Maturity, assessing debt service coverage, and verifying credit ratings, investors can effectively differentiate between genuine value opportunities and financial distress before allocating capital.
