Medallion Signature Guarantee Bond: What Banks, Broker-Dealers, and Transfer Agents Need to Know
If your institution is preparing to enroll in a medallion signature guarantee program (STAMP, SEMP, or the NYSE MSP), one of the prerequisites is a surety bond posted in favor of the program's administrator. The bond is the financial backstop that protects the program against losses tied to your stamps. Coverage runs from $100,000 at the low end to $10 million or more at the top. Selecting the right limit and placing the bond with the right carrier is a real decision, not a checkbox.
Surety Bond Authority has been writing surety bonds since 1971. We work with the specialty markets that handle medallion bonds for banks, credit unions, broker-dealers, and transfer agents. If you already know your program and your desired coverage limit and want to start the application, get a free quote online or call us at 800-333-7800.
What a Medallion Signature Guarantee Bond Actually Is
A medallion signature guarantee is a special stamp that a qualified financial institution applies to a securities transfer document. It guarantees that the signature on the document is genuine and that the signer had the legal capacity and authority to sign. Transfer agents, mutual funds, and other financial intermediaries require a medallion stamp before they will process a transfer of registered securities (stock certificates, mutual fund accounts, retirement accounts being transferred, and so on).
Because the medallion stamp is a financial guarantee, the program administrators that authorize institutions to issue stamps require each participating institution to carry a surety bond. The bond runs to the program (and through the program to harmed parties) and is the mechanism that pays out if a fraudulent or improperly guaranteed transfer creates a loss.
The Three Medallion Programs: STAMP, SEMP, and MSP
There are three medallion signature guarantee programs in the United States, and the bond requirements vary by program.
STAMP (Securities Transfer Agents Medallion Program). The largest of the three, with over 7,000 participating institutions. STAMP covers banks, credit unions, broker-dealers, and other financial intermediaries. Coverage limits typically range from $100,000 up to $10 million depending on the institution's transfer volume and risk profile.
SEMP (Stock Exchanges Medallion Program). Covers regional stock exchange member firms and trust companies. Bond coverage similarly ranges across the same general bands as STAMP.
MSP (New York Stock Exchange Medallion Signature Program). Covers NYSE member firms. The MSP has a higher minimum coverage requirement than the other two programs: the lowest bond limit available is $1,000,000.
An institution chooses the program that fits its business: a community bank or credit union typically uses STAMP, an NYSE member firm uses MSP, and regional exchange members may use SEMP. The bond is posted before the program issues your medallion stamps.
Choosing the Right Coverage Limit
The bond limit is also the cap on the institution's liability for any single guaranteed signature. If the bond limit is $500,000 and a fraudulent guarantee leads to a $750,000 loss, the surety pays up to $500,000 and the program (or the institution itself) absorbs the rest. The bond limit is therefore a deliberate underwriting decision, not just a compliance threshold.
Most institutions size the bond to match the largest single security transfer they reasonably expect to handle. Transfer agents will sometimes refuse to accept a medallion stamp where the underlying transfer value exceeds the bond limit, so undersizing the bond can mean turning customers away. On the other hand, larger bonds carry higher premiums, so there is a real tradeoff to think through.
Underwriting and What the Carrier Will Want to See
Medallion bonds are specialty financial bonds, so underwriting is more involved than a standard commercial bond. The carrier will typically want to see:
- Recent audited financial statements (the institution's, not the parent group's)
- An overview of your medallion guarantee procedures and internal controls
- Training documentation for the staff who will apply medallion stamps
- Loss history if your institution has previously carried a medallion bond
- Detail on transfer volume and the highest single transfer values you anticipate
The carriers writing these bonds want to see a serious risk-management posture. Institutions that take medallion guarantees seriously (training, dual signoff, document retention) typically get better pricing and faster approval.
How to Get a Medallion Bond Through Us
The process is straightforward in concept and detail-heavy in execution. We collect your institution's basic information, identify the program you are enrolling in, and pull underwriting through one of the specialty markets that writes medallion bonds. Plan on a longer underwriting cycle than a standard commercial bond, especially if this is your institution's first medallion bond. We will walk you through what the carrier needs and help you assemble it.
Frequently Asked Questions
Which medallion program does my institution need?
It depends on your institution type. Community banks and credit unions typically use STAMP. NYSE member firms use MSP. Regional exchange member firms and trust companies can use SEMP. Most institutions outside of NYSE membership go with STAMP because of its broader acceptance.
What is the lowest medallion bond limit available?
The smallest STAMP and SEMP bonds typically start at $100,000. The NYSE MSP has a higher floor: $1,000,000 is the minimum bond limit for MSP enrollment.
How big a bond do I actually need?
The bond limit should reflect the largest single securities transfer your institution is reasonably likely to guarantee. Going too small means you will have to refuse stamps on larger transfers. Going too large means paying premium on coverage you will never use. Most institutions land somewhere between $500,000 and $2,000,000.
How much does a medallion bond cost?
The premium depends on the bond limit, your institution's financial standing, your guarantee procedures, and your loss history. Specialty bond pricing varies meaningfully between carriers, so it pays to work with an agency that can shop multiple markets. Call us at 800-333-7800.
How long does the application take?
Plan on a longer underwriting cycle than a standard commercial bond. The carriers in this market take a careful look at your operation. For a first-time applicant with all documentation in order, two to four weeks is a reasonable expectation. Renewals are faster.
Can I switch programs after enrollment?
Yes, but you will typically need a new bond filing through the new program's administrator. The bond does not transfer between programs.
Get Your Medallion Signature Guarantee Bond
If your institution is enrolling in STAMP, SEMP, or the NYSE MSP, Surety Bond Authority can place your medallion bond with a specialty carrier that handles them. We have been writing surety bonds since 1971 and we work with the markets that price medallion bonds competitively. Get a free quote online or contact us, and one of our specialists will walk through your situation.