Bonds are traded on an exchange or over the counter, but the split is lopsided: the over-the-counter market handles more than 99 percent of corporate bond volume, and venues like NYSE Bonds list only a small slice of outstanding debt. The global bond market exceeds $140 trillion in outstanding debt, and almost all of that activity runs through a decentralized network of broker-dealers rather than a central order book. Where your trade happens shapes the price you pay, the spread you absorb, and what you can see before you commit.
How the Over-the-Counter Bond Market Works
The OTC bond market has no central exchange floor and no single matching engine. Broker-dealers hold their own inventory and negotiate prices directly with each other and with customers. Two investors buying the same bond at the same moment can pay slightly different prices depending on which dealer they go through and how large the order is.
That decentralized structure is why the OTC market dominates. Dealers can absorb enormous block trades, accommodate unusual maturities, and negotiate customized terms in ways a central order book cannot. Institutional traders routinely transact in round lots of $1 million or more in par value, and block trades of $15 million or higher are routine.1FINRA. Receiving Investors in the Block Market for Corporate Bonds A single corporation might have dozens of separate bonds outstanding with different coupons, maturities, and covenants, and listing each on an exchange is impractical.
The Financial Industry Regulatory Authority oversees broker-dealer conduct here.2FINRA. Five Steps to Protecting Market Integrity FINRA Rule 6730 requires every firm that is party to a trade in an eligible fixed-income security to report the transaction to the Trade Reporting and Compliance Engine within 15 minutes of execution.3FINRA. 6730 Transaction Reporting TRACE then publishes the price and volume publicly, which is how a retail investor can check whether their fill was reasonable. Before TRACE launched in 2002, retail bond investors had almost no access to real-time price data. Coverage has since expanded to agency securities, asset-backed and mortgage-backed securities, and, since 2017, U.S. Treasury securities.4FINRA. TRACE at 20 – Reflecting on Advances in Transparency in Fixed Income
What Exchange-Traded Bonds Look Like
A small fraction of bonds trade on centralized exchanges such as the NYSE Bonds platform. These venues work much more like the stock market. Buy and sell orders post to a visible order book and are matched automatically by price and time priority.5NYSE. NYSE Bonds You can see the best bid and offer in real time, which removes most of the guesswork of OTC negotiation. Regulated exchanges operate under SEC oversight and must maintain rules that promote fair and orderly markets.6U.S. Securities and Exchange Commission. Statutes and Regulations
Transparency is the main advantage, but selection is thin. Exchange-listed bonds represent a small share of overall bond trading, and the issues you find on them tend to be the ones built for retail. Everything else sits in the OTC market.
Which Bond Types Trade Where
U.S. Treasuries
Treasury bonds, notes, and bills trade over the counter, not on a stock exchange. In the interdealer market, most trading in benchmark Treasuries runs through electronic platforms with a central limit order book, such as BrokerTec and eSpeed. Dealer-to-customer transactions typically happen bilaterally, either by phone or through electronic request-for-quote systems.7U.S. Department of the Treasury. Joint Staff Report: The U.S. Treasury Market on October 15, 2014 Treasury futures are different animals and trade on regulated futures exchanges like the Chicago Board of Trade.
Corporate Bonds
The vast majority of corporate bonds trade OTC. Some are also listed on exchanges like NYSE Bonds. To be exchange-listed, a bond generally has to be registered with the SEC under the Securities Act of 1933, with a prospectus and full financial disclosures.8eCFR. 17 CFR Part 230 – General Rules and Regulations, Securities Act of 1933 Many corporate bond offerings exceeding $10 million in aggregate principal must also comply with the Trust Indenture Act of 1939, which requires the issuer to appoint an independent trustee to protect bondholders.9Office of the Law Revision Counsel. 15 USC Chapter 2A Subchapter III – Trust Indentures
Municipal Bonds
Municipal bonds, issued by state and local governments, trade almost exclusively OTC. Interest on most munis is excluded from federal income tax under 26 U.S.C. ยง 103, which is why higher-bracket investors favor them.10Office of the Law Revision Counsel. 26 U.S. Code 103 – Interest on State and Local Bonds The exclusion does not cover certain private activity bonds that fail to qualify under the Internal Revenue Code, or arbitrage bonds. A muni from a state other than your own may still be subject to your state’s income tax.
Convertibles and Baby Bonds
Two kinds of corporate debt land on exchanges more often than their cousins. Convertible bonds, which let the holder swap the debt for a set number of the issuer’s shares, are commonly listed alongside the issuer’s stock because the equity-like features fit an exchange format. Baby bonds, issued in $25 par value denominations instead of the standard $1,000, are also frequently exchange-listed because their small size is designed for retail buyers in the first place.11FINRA. Baby Bonds: What to Know Before Investing
What the Venue Costs You
In the OTC market, the main transaction cost is the bid-ask spread: the gap between what a dealer will pay for a bond and what the dealer will sell it for. Dealers may also add a markup when selling to you or a markdown when buying from you, on top of the prevailing market price. These costs are not always broken out separately on your trade confirmation, though FINRA rules require broker-dealers to disclose markups and markdowns on certain transactions.
Trade size drives the number. For municipal bonds, retail-sized trades of $100,000 or less carry an average effective spread of about 56 basis points (0.56 percent of price), while trades of $1 million or more see spreads closer to 18 basis points.12MSRB. A Comparison of Transaction Costs A retail investor can buy as little as one bond with a $1,000 face value, but the wider spread is the price of that access.
Exchange-listed bonds benefit from a visible order book that lets you see competing bids and offers before you commit, which can narrow the effective spread. That advantage applies only to the small subset of bonds actually listed. For everything else, your transparency comes after the fact, from TRACE prints rather than from a live book.
Bond ETFs if You Want Exchange Access
If you want exchange-traded exposure to bonds without working through the OTC market, bond exchange-traded funds are the alternative. A bond ETF holds a portfolio of bonds and trades on a stock exchange throughout the day like a share of stock. Bond ETFs have been available since 2002 and have grown steadily as a way for retail investors to get diversified fixed-income exposure with lower minimums and real-time price transparency.
They are not the same instrument as individual bonds. An ETF has no fixed maturity date; the fund continuously buys and sells bonds to maintain its target portfolio, so you do not receive a guaranteed return of principal on a specific date. The ETF’s market price can also drift slightly from the value of its underlying bonds. In exchange, you avoid the wide spreads that small OTC bond trades can carry, and you build a diversified bond position with a single purchase.
How to Check the Price You Got
Because most bond trades happen OTC, the price you receive is negotiated rather than discovered on a public book. TRACE is the equalizer. Every reportable transaction prints to the public feed within 15 minutes of execution, and you can compare your fill against contemporaneous trades in the same security. If your dealer sold you a bond at a price well above the recent prints for similar-sized trades, that gap is the markup you paid, whether or not it was itemized. For municipal securities, the MSRB’s EMMA system plays a similar role. Using those tools after a trade is the practical answer to the transparency gap that comes with an OTC market, and it is the single most useful habit for anyone buying individual bonds through a broker.