Bond Secondary Market in India: How Trading and Settlement Actually Works

Introduction

India's bond market is often described as large but opaque. Total bond issuance crossed Rs. 9.9 trillion in FY2024–25 and yet most retail investors interact with it primarily through the primary market, applying for new NCD issues and holding to maturity. The secondary market where existing bonds are bought and sold between investors after issuance remains underutilized by retail participants, partly because how it actually works is not well understood.

The secondary market matters for a simple reason: it determines whether an investor can exit a bond position before maturity, at what price, and how quickly. Without a functioning secondary market, every bond investment is a locked-in commitment. With one, investors gain the flexibility to respond to changing financial needs or market conditions before the bond matures.

This article explains how India's bond secondary market is structured, how trades are executed and settled, and what retail investors need to know to participate. All content is educational and does not constitute investment advice.

What Is the Bond Secondary Market?

The bond secondary market is where previously issued bonds are traded between investors without the issuer being a party to the transaction. When a bond is issued in the primary market, the issuer raises capital from investors. After issuance, those investors can sell their holdings to other investors in the secondary market. The issuer's obligation to pay coupons and redeem at maturity continues unchanged regardless of how many times the bond changes hands.

In India, the bond secondary market operates through two main channels: the exchange-traded segment on NSE and BSE, and the OTC segment for government securities accessed through the NDS-OM platform.

The Exchange-Traded Segment: NSE and BSE

NSE operates the CBRICS segment (Capital Market, Bond, and Currency segment) for bond trading. BSE operates the BOND platform. Both allow retail investors to buy and sell listed debt securities during standard market hours 9:00 AM to 5:00 PM on working days.

Listed bonds are identified by their ISIN a 12-character alphanumeric code unique to each bond series. Investors search for bonds by ISIN or company name and can see live bid and ask prices, last traded price, traded volume, and YTM.

Trades on the exchange segment are order-driven buy and sell orders are entered into the exchange's order matching system, which automatically matches orders based on price and time priority.

The OTC Segment: NDS-OM for Government Securities

Government securities (G-Secs), State Development Loans (SDLs), and Treasury Bills traded in the wholesale market use the Negotiated Dealing System – Order Matching (NDS-OM) platform operated by CCIL. This is primarily an institutional market.

Retail investors can access government securities through the RBI Retail Direct scheme which allows individuals to open a Retail Direct Gilt (RDG) account and trade G-Secs on the NDS-OM platform directly at rbiretaildirect.org.in.

An important pricing difference: on NDS-OM, bonds are quoted at clean price and accrued interest is paid separately. On NSE/BSE corporate bond segments, bonds are quoted and settled at dirty price (inclusive of accrued interest). For a detailed explanation, refer to Clean Price vs Dirty Price: Meaning and Key Differences.

How Bond Trades Are Executed on NSE and BSE

A retail investor buying a listed corporate bond in the secondary market follows this sequence:

Step 1 Identify the bond: Search by ISIN, company name, or credit rating. Review current market price, YTM, credit rating, and maturity date.

Step 2 Place an order: Enter a buy order specifying quantity and price market price or a limit price. The order is submitted to the exchange's order matching system.

Step 3 Order matching: The exchange matches orders based on price-time priority. If a matching sell order exists, the trade executes immediately. Otherwise, the order remains in the order book.

Step 4 Trade confirmation: Both buyer and seller receive a trade confirmation containing the ISIN, quantity, price, trade value, and settlement date.

Step 5 Settlement: On T+1, bonds are debited from the seller's Demat account and credited to the buyer's. Funds are credited to the seller's bank account and debited from the

Clearing Corporations: NSCCL and ICCL

Two SEBI-regulated clearing corporations underpin settlement in India's exchange-traded bond market:

NSCCL (National Securities Clearing Corporation Limited): The clearing corporation of NSE. NSCCL acts as central counterparty for all NSE trades guaranteeing settlement even if one party defaults. It computes net obligations, manages margins, and ensures securities and funds transfer on the settlement date.

ICCL (Indian Clearing Corporation Limited): The clearing corporation of BSE. ICCL performs the same function for trades on BSE's BOND platform.

The central counterparty model means retail investors do not need to worry about counterparty default NSCCL or ICCL guarantees the trade settles as agreed.

Clean Price vs Dirty Price in Secondary Market Trading

When a bond is traded between coupon payment dates, the buyer compensates the seller for interest accrued since the last coupon.

• Clean price: Bond price excluding accrued interest used for comparison and yield calculation.

• Dirty price: Actual amount paid clean price plus accrued interest. On NSE's corporate bond segment, bonds settle at dirty price.

• Example: Bond with Rs. 1,000 face value, 9% annual coupon, traded 3 months after last coupon payment:

• Accrued interest = Rs. 1,000 × 9% × (3/12) = Rs. 22.50

• Clean price: Rs. 980

• Dirty price (actual amount paid): Rs. 980 + Rs. 22.50 = Rs. 1,002.50

For a comprehensive guide, refer to Clean Price vs Dirty Price: Meaning and Key Differences.

Why Bond Secondary Market Liquidity Varies

Not all listed bonds trade with the same frequency. Liquidity varies significantly across instruments:

• High liquidity: Major PSU bonds (PFC, REC, IRFC, NHAI), large public sector bank bonds, and benchmark G-Secs tend to have active secondary market trading with narrow bid-ask spreads.

• Moderate liquidity: Large, well-rated NCD issues from prominent NBFCs may trade several times a day but with wider spreads.

• Low liquidity: Mid-tier or smaller issuer NCDs even if investment-grade may trade infrequently. Exit at fair value before maturity is not guaranteed.

Key factors affecting liquidity: issue size, credit rating, issuer recognition, time to maturity, and institutional investor participation.

How Retail Investors Access the Secondary Market

Through a broker: Open a Demat and trading account with a SEBI-registered broker offering bond trading on NSE or BSE.

Through SEBI-registered OBPPs: Platforms such as BondScanner aggregate listed bonds, display standardised disclosures, and facilitate exchange-linked transactions with NSCCL/ICCL settlement guarantee. Explore available listed bonds at BondScanner

Through RBI Retail Direct (for G-Secs): Open an RDG account with the RBI and trade government securities directly on NDS-OM at rbiretaildirect.org.in.

For a comparison of bond trading platforms in India, refer to Bond Trading Platforms in India: Comparison Guide.

What Affects Secondary Market Bond Prices

• Interest rate changes: The most significant driver. RBI rate cuts push existing bond prices up; rate rises push them down. For a detailed explanation, refer to RBI Repo Rate Cut: Impact on Bond Yields and Prices.

• Credit rating changes: A downgrade reduces institutional demand and market price. An upgrade has the opposite effect.

• Time to maturity: As a bond approaches its maturity date, its market price converges toward face value.

• Supply and demand: Large institutional block sales can temporarily depress prices; high demand can push prices above face value.

• Accrued interest: The dirty price rises incrementally between coupon dates due to accumulating accrued interest, even when the clean price is unchanged.

Risks of Trading Bonds in the Secondary Market

• Liquidity risk: The most material risk. If a bond does not trade actively, exit at fair value before maturity may be impossible or require accepting a discount.

• Price risk: Bonds sold before maturity may realise a price lower than the purchase price if rates have risen or issuer credit has deteriorated. Holding to maturity avoids price risk but removes flexibility.

• Bid-ask spread: In thinly traded bonds, the gap between buy and sell prices can be wide representing an implicit transaction cost that erodes returns.

• Settlement risk: Exchange-traded bonds through NSE or BSE carry very low settlement risk due to clearing corporation guarantees. OTC transactions carry higher settlement risk.

For a comprehensive overview, refer to Understanding Risks in Bond Investing.

FAQs

How does the bond secondary market work in India?

In India's bond secondary market, listed bonds are traded between investors on NSE and BSE. Trades are executed through a broker or SEBI-registered OBPP, matched on the exchange, and settled on a T+1 basis. Settlement is guaranteed by NSCCL and ICCL.

What is T+1 settlement in bond trading?

T+1 settlement means a bond trade settles one working day after the trade date. If a bond is bought on Monday, the buyer's Demat account is credited and the seller's bank account receives proceeds on Tuesday.

What is the difference between clean price and dirty price in bond trading?

The clean price excludes accrued interest. The dirty price includes accrued interest and is the actual amount the buyer pays. NSE's corporate bond segment quotes and settles at dirty price. NDS-OM quotes at clean price with accrued interest paid separately.

Can retail investors trade bonds in the secondary market in India?

Yes. Retail investors can trade listed bonds on NSE and BSE through a broker or SEBI-registered OBPP such as BondScanner. Government securities can also be traded through the RBI Retail Direct platform.

Why is secondary market liquidity low for some bonds?

Liquidity depends on issue size, credit rating, issuer recognition, time to maturity, and institutional participation. Large PSU bonds are typically more liquid than smaller mid-tier NBFC NCDs.

What happens if a bond trade fails to settle?

On exchange-traded bonds, NSCCL or ICCL guarantees settlement. If the seller fails to deliver, the clearing corporation invokes a close-out, purchasing the bonds from the market. The defaulting seller bears the cost differential.

What is ISIN and why does it matter in bond trading?

ISIN is a unique 12-character alphanumeric code for each listed bond series. It is used to identify bonds when placing orders on NSE or BSE and is the primary reference for checking trading data, settlement status, and credit rating informatio

This article is published by BondScanner, a SEBI-registered Online Bond Platform Provider (OBPP). Links to BondScanner's bond listing page, Android app, and iOS app referenced in this article are for informational purposes only.

Explore listed bonds on the BondScanner app:

Disclaimer

This blog is intended solely for educational and informational purposes. The instruments, issuer categories, yield ranges, and examples mentioned herein are illustrative and should not be construed as investment advice or recommendations.

BondScanner is a SEBI-registered OBPP and does not provide personalised investment advice. Nothing in this article is a solicitation to buy or sell any security.