What is a bond? Meaning, definition & how it works
A bond is a debt security issued by a government, public-sector entity, or private company to raise funds from investors. The issuer promises to pay the bondholder a fixed rate of interest over the bond’s life and return the face value on a predetermined maturity date.
Bonds belong to the fixed-income asset class because coupon payments are defined and predictable. In India, the bond market has two main segments: the government securities market, regulated by the RBI, and the corporate bond market, regulated by SEBI. Together they form a market of approximately ₹240 lakh crore (US$ 2.8 trillion) as of early 2026.
Individual investors can buy bonds through RBI Retail Direct, designated bank branches, NSE and BSE, or SEBI-registered online bond platforms. Many investors also gain indirect exposure through debt mutual funds, which hold a mix of government securities and corporate bonds.
Did you know? RBI Floating Rate Savings Bonds currently offer 8.05% per annum, one of the few sovereign-backed instruments available directly to Indian retail investors.
How does a bond work?
When an issuer needs capital, it issues bonds with three core terms: face value (the amount borrowed), coupon rate (the annual interest rate), and tenure (the period until repayment). Investors who buy the bond effectively lend that face value to the issuer.
The bond lifecycle in four steps:
- Issuance: The issuer (RBI on behalf of the Government of India, or a corporation) sets the face value, coupon rate, and maturity date. Bonds are sold through auctions (G-Secs) or book-building (corporate bonds).
- Coupon payment: The issuer pays interest, usually semi-annually or annually, throughout the bond’s life. For example, a ₹1,00,000 bond with a 7% annual coupon pays ₹3,500 every six months.
- Secondary market trading: Bondholders can sell their bonds before maturity on the stock exchange (NSE/BSE) or over-the-counter. The traded price depends on current interest rates, credit quality, and remaining tenure.
- Maturity: On the maturity date, the issuer repays the full face value to whoever holds the bond at that point.
Pro tip: Buying a bond at a discount (below face value) gives you a yield higher than the stated coupon rate. Buying at a premium gives you a yield lower than the coupon. Always check the yield to maturity (YTM), not just the coupon rate, before investing.
Formula and valuation
Current yield
Current Yield (%) = (Annual Coupon Payment / Current Market Price) × 100Where:
- Annual Coupon Payment = Face Value × Coupon Rate
- Current Market Price = Price at which the bond trades in the secondary market
Bond price (valuation formula)
Bond Price = [C × (1 − (1 + r)^−n) / r] + [F / (1 + r)^n]Where:
- C = Coupon payment per period
- r = Required rate of return per period (decimal)
- n = Total payment periods remaining
- F = Face value
When the required yield exceeds the coupon rate, the bond trades at a discount. When yield is below the coupon rate, it trades at a premium. YTM is the discount rate that equates the bond’s price to its present value and is the standard metric for comparing bonds.
Example with real numbers
Rakesh, a 42-year-old portfolio manager based in Mumbai, buys a AAA-rated corporate bond through a SEBI-registered online bond platform.
Given:
| Parameter | Value |
|---|---|
| Face value | ₹1,00,000 |
| Coupon rate | 7.10% per annum |
| Payment frequency | Semi-annual |
| Tenure | 5 years |
| Purchase price | ₹1,00,000 (at par) |
Annual income: ₹1,00,000 × 7.10% = ₹7,100 (paid as ₹3,550 every six months)
Effect of a rate rise:
Twelve months later, required yields on comparable bonds rise to 8%. The bond’s market price falls. Using the valuation formula (4 years = 8 semi-annual periods remaining, r = 4% per period):
Bond Price = [3,550 × (1 − (1.04)^−8) / 0.04] + [1,00,000 / (1.04)^8]
≈ ₹23,610 + ₹73,069 = ₹96,679If Rakesh holds to maturity, he receives the full ₹1,00,000. If he sells now, he gets approximately ₹96,679, a mark-to-market loss of ₹3,321.
Current yield at new price: ₹7,100 / ₹96,679 × 100 = 7.34%
Types of bonds in India
Government securities (G-Secs)
G-Secs are bonds issued by the central government through RBI auctions. They carry zero credit risk and set the benchmark rate for all other debt in India. Tenures range from 1 year to 40 years. Retail investors can buy G-Secs directly through RBI Retail Direct with a minimum of ₹10,000.
[FLAG: Verify current 10-year G-Sec yield at RBI or CCIL before publishing.]
State development loans (SDLs)
SDLs are issued by state governments and work like G-Secs, but carry a yield premium of 25 to 50 basis points over central government securities. Banks hold SDLs to meet statutory liquidity ratio (SLR) requirements; retail access is limited but available through some bond platforms.
Corporate bonds
Companies issue corporate bonds to raise long-term debt without diluting equity. Around 98% of Indian corporate bonds are placed privately with institutional investors, though SEBI-registered online platforms now allow retail access. Bonds are rated by CRISIL, ICRA, CARE, or India Ratings, with AAA and AA-rated paper making up 85 to 90% of issuances.
RBI floating rate savings bonds (FRSBs)
Sovereign retail bonds with a 7-year lock-in, paying 8.05% per annum (reset semi-annually). Available through designated banks; not tradeable in the secondary market. NRIs are not eligible.
Zero-coupon bonds and T-bills
Zero-coupon instruments pay no periodic interest. They are issued at a discount and redeemed at face value. Treasury bills (91, 182, and 364 days) are the most common zero-coupon instruments in India.
Quick comparison
| Bond type | Credit risk | Interest taxable? | Tradeable? |
|---|---|---|---|
| G-Sec | Nil | Yes | Yes |
| SDL | Very low | Yes | Yes |
| Corporate (AAA) | Low | Yes | Yes |
| RBI FRSB | Nil | Yes | No |
| T-bill | Nil | Yes | Yes |
Key components of a bond
1. Face value (par value) The principal amount the issuer borrows and repays at maturity. In India, G-Secs have a face value of ₹100 per unit; corporate bonds typically use ₹1,000 or ₹10,000.
2. Coupon rate The annual interest rate expressed as a percentage of face value. A ₹1,00,000 bond with a 7% coupon pays ₹7,000 per year. Fixed-rate bonds lock this in at issuance; floating-rate bonds (like RBI FRSBs) reset periodically.
3. Maturity date The date the issuer repays the face value. Bonds are short-term (under 3 years), medium-term (3 to 10 years), or long-term (above 10 years). Longer tenures generally come with higher yields to compensate for additional time risk.
4. Yield to maturity (YTM) YTM is the total annualised return if the bond is held to maturity and all coupons are reinvested at the same rate. It accounts for purchase price, coupon, face value, and time remaining. Use YTM (not the coupon rate) to compare bonds fairly.
5. Credit rating Ratings from CRISIL, ICRA, CARE, or India Ratings indicate the issuer’s ability to service debt. AAA is the highest quality (lowest risk); D indicates default. Insurance companies and pension funds in India are typically restricted from buying bonds rated below AA.
Benefits of investing in bonds
1. Predictable, regular income Bonds pay interest at fixed intervals. An investor holding ₹10 lakh in a 7.5% corporate bond receives ₹75,000 per year regardless of equity market conditions, making bonds useful for retirees and anyone planning for a known expense.
2. Capital protection at maturity If a bond is held to maturity, the face value is returned in full (absent default). Unlike equities, the invested amount does not erode permanently as long as the issuer meets its obligations.
3. Portfolio diversification Quality bonds tend to behave differently from equities. When equity markets fall sharply, government bonds often hold their value or appreciate, smoothing overall portfolio returns over market cycles.
4. Sovereign safety for government bonds G-Secs and RBI savings bonds carry a sovereign guarantee. There is no credit risk; principal and interest are backed by the Government of India.
5. Tax efficiency for specific categories Investors in the 30% bracket can benefit from tax-free bonds, where coupon income is exempt from income tax.
Risks and limitations
1. Interest rate risk When market rates rise, existing bond prices fall. An investor who sells before maturity may receive less than the purchase price. Longer-duration bonds are more sensitive to rate changes.
2. Credit (default) risk The issuer may fail to pay coupons or repay principal. This risk is near-zero for government bonds but real for corporate issuers. Check CRISIL, ICRA, or CARE ratings before investing.
Important: Rating downgrades can happen after you buy. A AAA-rated bond can be downgraded if the issuer’s financial position deteriorates.
3. Liquidity risk India’s corporate bond secondary market remains thin outside the top-rated names. Selling before maturity may mean accepting a lower price or finding no buyer.
4. Inflation risk A fixed 7% coupon loses purchasing power if inflation rises. Long-tenure fixed-rate bonds are most exposed to this.
5. Reinvestment risk Coupon payments need to be reinvested. If rates have fallen since purchase, reinvestment happens at a lower rate, reducing the effective return below the original YTM estimate.
Frequently asked questions
What is a bond in simple terms?
A bond is a loan that an investor gives to a government or company. In exchange, the borrower (issuer) agrees to pay interest at a fixed rate for a set period, then return the original amount at the end.
The investor earns income from the interest, and gets the principal back at maturity.
बॉन्ड क्या होता है? (What is a bond in Hindi?)
बॉन्ड एक ऋण साधन है जिसमें निवेशक किसी सरकार या कंपनी को एक निश्चित अवधि के लिए धन उधार देता है। बदले में, जारीकर्ता (issuer) नियमित ब्याज (कूपन) का भुगतान करता है और अवधि समाप्त होने पर मूलधन वापस करता है। भारत में, सरकारी बॉन्ड को RBI नियंत्रित करती है और कॉर्पोरेट बॉन्ड को SEBI नियंत्रित करता है।
In India, bonds can be purchased through RBI Retail Direct, designated bank branches, NSE, BSE, or SEBI-registered online bond platforms.
How is a bond’s interest rate (coupon rate) decided?
The coupon rate is set by the issuer at the time of issuance and reflects prevailing market interest rates, the issuer’s credit quality, and the bond’s tenure.
A government issuer (lowest credit risk) pays a lower rate than a corporate issuer. Longer-tenure bonds generally offer higher rates to compensate investors for locking in their money for more time.
What is the difference between a bond and a fixed deposit?
Both offer fixed returns, but they work differently. A fixed deposit is a contract directly with a bank; it is not tradeable.
A bond is a marketable security that can be bought and sold on exchanges before maturity. Bonds can appreciate in value if interest rates fall; FDs cannot.
FD interest is fully taxable; certain bonds (tax-free bonds) offer tax-exempt interest.
What does AAA rating on a bond mean?
A AAA rating is the highest credit quality assigned by rating agencies such as CRISIL, ICRA, CARE, or India Ratings.
It means the issuer has an extremely low probability of defaulting on interest or principal payments.
In India, AAA and AA-rated bonds account for roughly 85 to 90% of corporate bond issuances, which makes the domestic market heavily concentrated in high-quality paper.
How can I invest in government bonds in India?
Retail investors have three main options. First, the RBI Retail Direct platform (retail.rbi.org.in) allows direct purchase of G-Secs and RBI savings bonds with no intermediary.
Second, banks sell RBI Floating Rate Savings Bonds over the counter.
Third, investors can buy G-Secs and listed corporate bonds through a demat account on NSE or BSE, or via SEBI-registered online bond platforms.
What is bond valuation?
Bond valuation is the process of calculating the fair price of a bond by finding the present value of all its future cash flows: the periodic coupon payments and the face value at maturity.
The discount rate used is the investor’s required return or prevailing market yield. If the required yield is higher than the coupon rate, the bond will be priced below face value (at a discount). If it is lower, the bond will be priced above face value (at a premium).
Should I include bonds in my investment portfolio?
Bonds are generally suited for investors who want stable income, lower volatility than equities, or are approaching a financial goal and want to reduce risk.
For a salaried investor in the 30% bracket, AAA-rated corporate bonds or tax-free bonds may offer better after-tax returns than bank FDs.
For a retired investor, G-Secs or RBI savings bonds provide sovereign safety with predictable income.
The right allocation depends on the investor’s time horizon, tax situation, and risk tolerance. Consulting a SEBI-registered investment adviser is advisable before taking a position.