How to Look Up a Municipal Bond by CUSIP

The CUSIP (Committee on Uniform Securities Identification Procedures) is a nine-character identifier assigned to every municipal bond, enabling investors to find the bond’s official statement, pricing history, credit rating, and trade data in public databases—primarily the EMMA system run by FINRA.

What a CUSIP is and why it matters

A CUSIP is like a barcode for a bond. It contains embedded information: the issuer, the bond series, and maturity date. Because muni bonds are not listed on centralized exchanges like stocks, the CUSIP is the standard reference number that links a bond across multiple systems.

A typical CUSIP looks like: 266646QU9 (a New York City general obligation bond). The first six characters usually represent the issuer; the next two identify the specific bond series; the final digit is a check digit.

Once you have a muni’s CUSIP, you can:

• Retrieve the official statement (the 20–100 page prospectus detailing finances, covenants, and risks)
• View trade history and current bid-ask spreads
• Access the issuer’s financial reports and rating information
• Monitor any credit downgrades or defaults

Finding a CUSIP

If you already own the bond: Check your brokerage statement. The CUSIP is listed alongside the bond’s name, purchase price, and current value.

If you’re researching a bond: Ask your broker to identify the CUSIP. Provide the issuer name, issuance date, coupon rate, and maturity date.

From a prospectus or offering document: The CUSIP appears on the cover page or in the pricing supplement.

Public databases: EMMA and other tools (see below) allow searches by issuer name, state, or keyword; results include the CUSIP.

Using EMMA for CUSIP lookup

The Electronic Municipal Market Access (EMMA) system, maintained by FINRA, is the primary public repository for muni bond data. It’s free and requires no login.

Step 1: Visit the EMMA website (emma.msrb.org)

Step 2: Use the “Advanced Search” for bonds

• Click “Bonds” in the top menu
• Select “Advanced Search”
• Enter the CUSIP in the search field (or leave it blank to search by issuer, state, or coupon)
• Click “Find Bonds”

Step 3: Review the results

The search returns all bonds matching your criteria, showing:

• Issuer name
• CUSIP
• Coupon rate and maturity date
• Issue date and amount issued
• Credit rating (if rated)
• Status (active, matured, called, or defaulted)

Step 4: Click the CUSIP to open the bond’s detail page, which displays:

• Official Statement (OS): The primary document; typically a PDF filed when the bond was issued. It covers the issuer’s finances, debt structure, legal opinion, and risk factors.
• Continuing Disclosure: Periodic financial reports and notices filed by the issuer after issuance.
• Trade History: Bid-ask spreads and last-trade prices from the MSRB.
• Master Database Information: Coupon, maturity, ratings from Moody’s, S&P, and Fitch (if the bond is rated).

Understanding what you’ll find

Official Statement: This is the prospectus equivalent for munis. It discloses financial information, the purpose of the bonds, how they’re secured, and major risks. For a school district bond, it’ll show enrollment trends, fund balance, and revenue sources. For a hospital bond, it’ll show patient volume, payer mix, and debt service coverage.

Rating: Most public munis are rated by at least one of the “big three” agencies (Moody’s, S&P, Fitch). The rating is displayed on EMMA’s bond-detail page. Ratings range from AAA (safest) to C (distressed). Unrated bonds are issued by smaller issuers and are riskier.

Pricing and spreads: EMMA shows the bid-ask spread on trades. A wide spread (e.g., $980 bid, $1,010 ask) indicates a less liquid bond; a tight spread suggests it trades frequently. Recent trades are listed with timestamps and sizes.

Continuing Disclosure: After issuance, the issuer must file annual financial reports and certain notices (defaults, rating changes, litigation). These filings appear chronologically on the bond’s EMMA page. Reviewing them shows whether the issuer is meeting financial covenants and whether conditions have deteriorated.

Secondary databases and tools

CUSIP Lookup via your broker: Many brokerage platforms (Fidelity, Charles Schwab, Vanguard) allow CUSIP search within their muni-bond trading screens. If you have an account, this is often faster than EMMA.

Bloomberg Terminal: Professional investors use Bloomberg’s CUSIP search and analytics. It’s subscription-based and offers deeper market data, credit analysis, and portfolio management tools.

S&P Global Market Intelligence: Another institutional tool with comprehensive muni data, including financial metrics and comparative analytics.

IRS Form 5100-B: For federal-tax-exempt bonds, the IRS publishes the Form 5100-B classification, which is also searchable by CUSIP on EMMA. This shows the bond’s tax status.

Common scenarios for CUSIP lookup

You own a muni bond and want to see recent trades: Search EMMA by CUSIP, then review the “Trade History” tab. You’ll see recent bids and asks, helping you gauge fair value if you’re considering a sale.

You’re evaluating a new muni offering: The prospectus contains a CUSIP; use EMMA to verify the issuer’s prior bonds, their ratings, and whether they’ve faced defaults or rating downgrades.

A bond is called or matures: EMMA’s status will show “Matured” or “Called.” Check the continuing disclosure to confirm the issuer paid off the principal on time.

You want to compare two issuers: Look up all bonds from each issuer (EMMA allows issuer-name search), compare their ratings, spreads, and debt levels. Wider spreads on newer bonds suggest deteriorating credit perception.

Troubleshooting CUSIP searches

No results found: The CUSIP may be misspelled (they’re case-sensitive in some systems) or the bond may be called, matured, or retired. Try searching by issuer name instead.

“Unrated” bonds: Smaller issuers sometimes don’t seek ratings, which is legal but less transparent. Rely more heavily on the official statement and continuing disclosure.

Old bonds: Bonds issued before 1985 or so may have incomplete data on EMMA. For historical context, check news archives or SEC filings if the issuer is a corporation with muni subsidiaries.

Very recent bonds: New offerings appear on EMMA quickly but may lack trade history for a few days.

Why CUSIP matters for due diligence

A CUSIP lookup is the starting point for serious muni research. The official statement reveals the issuer’s finances and debt structure; the continuing disclosure shows whether conditions have stayed stable; the rating and trade history indicate market perception of credit risk. For a retail investor, a 20-minute CUSIP search can uncover red flags (hidden liability, prior defaults, widening spreads) before you buy.

See also