Variable Rate Demand Obligations

By Ryan O'Connell, CFA, FRM Published November 14, 2026

Variable rate demand obligations let municipal borrowers finance long-lived projects while investors receive a frequently reset interest rate and a contractual opportunity to tender their bonds for purchase. The key question is who supplies the purchase cash when the investor wants to leave. A successful remarketing and a bank-funded tender can deliver the same payment to the investor through very different funding arrangements.

This guide covers U.S. municipal VRDOs, also called variable-rate demand notes or VRDNs. Sources were researched on November 13, 2026. Historical agreements illustrate their stated terms; the worked transaction is hypothetical.

What Are Variable Rate Demand Obligations?

A VRDO combines a variable interest rate with a demand feature: a holder’s contractual right to tender the security for purchase, commonly at par plus accrued interest, after satisfying notice and delivery requirements. Its final legal maturity can be many years away. Daily and weekly rate modes are common, but the issue documents determine the available modes and tender rights. ^[1]

Separate the demand feature from the bond’s underlying credit. A general obligation pledge, project revenues or payments from a conduit borrower determine different sources of debt repayment. The municipal bonds guide explains those backing arrangements. A municipal label also does not establish tax exemption: variable-rate municipal securities can be taxable or tax exempt.

Who Does What in a VRDO Transaction?

• Issuer and borrower: the municipal issuer sells the bonds. In a conduit financing, a separate borrower may supply the pledged repayment cash; do not assume the issuer’s taxing power backs it.
• Remarketing agent: a dealer sets the rate under the documents and seeks buyers for tendered bonds. Appointment as remarketing agent does not obligate the dealer to buy them for its own account.
• Tender agent: receives tender instructions and administers purchases and transfers under the governing arrangements.
• Trustee: administers the indenture and enforces its provisions for holders. It may also act as tender or paying agent; those jobs do not make it the source of purchase cash.
• Liquidity provider: supplies purchase funding under an applicable facility when its contractual conditions are met.

A beneficial owner normally communicates through its broker or custodian and the securities-depository system. Ask for that intermediary’s deadline, which can precede the document’s formal deadline. Sending a sell order is not necessarily delivering a valid tender notice. The MSRB describes these distinct agency functions and the notice requirement. ^[1]

Letter of Credit vs Standby Bond Purchase Agreement

Two common bank-support structures are a letter of credit (LOC) and a standby bond purchase agreement (SBPA). Here, LOC means letter of credit. The important distinction is whether the arrangement supports scheduled debt service, tender purchases, or both. ^{[5] [6]}

An SBPA is generally purchase liquidity rather than a guarantee of scheduled principal and interest. A direct-pay LOC provides broader payment support, but its amount, term, draw requirements and the bank’s ability to pay still matter. Neither structure turns the municipal bond into an FDIC-insured bank deposit. ^{[1] [3]}

Self-liquidity is a separate funding arrangement

Some structures rely on liquidity supplied by the issuer, conduit borrower or an affiliate. The MSRB recognizes this self-liquidity category. Evaluate the actual commitment, available cash and ability to realize assets during stress; do not infer a bank backstop. ^[7] This is an application of the difference between market liquidity and funding liquidity discussed in liquidity risk management.

Example: A $1 Million VRDO Tender

Suppose an investor owns $1,000,000 par of a fictional municipal VRDO with Thursday weekly resets. Its stipulated contract permits tender on any business day with at least seven calendar days’ notice, received by 10 a.m. New York time. The investor gives valid notice on Monday, May 3, 2027 for purchase on Monday, May 10. Assume both dates are business days under the contract and all transfer requirements are met.

The last coupon was paid May 3. Assume a 3.65% annual rate applies throughout the seven-day accrual period, including an unchanged reset on May 6. Interest uses Actual/365, accruing from May 3 through May 9 and excluding the purchase date.

The reset falls inside the notice period. The investor’s scheduled exit follows the tender terms, while the reset governs interest.

Branch A: Remarketing succeeds

Assume new investors fund the entire $1,000,700 purchase price through the purchase account. The departing holder receives that cash, the new investors own $1,000,000 par, and no bank purchase is needed. The issuer’s debt remains outstanding.

Branch B: Remarketing fails, but the SBPA is available

Assume there are no buyer proceeds. The bonds qualify for purchase, the SBPA remains in force with sufficient principal and interest capacity, the required request is timely and conforming, and the bank performs. The bank supplies $1,000,700 through the agreed purchase process. The holder receives the tender payment; the bank acquires the $1,000,000 par holding as bank-held debt. Paying the departing investor has not repaid the issuer’s principal obligation.

Branch C: Support has terminated before purchase

Change the assumptions: this fictional SBPA specifies immediate termination upon a qualifying borrower bankruptcy, and that event occurs before May 10. Assume no replacement support or other purchase cash. The former liquidity bank no longer owes that purchase under the terminated commitment. The investor cannot assume a par exit on the scheduled date and may remain exposed to the underlying debt.

That bankruptcy trigger is stipulated for this example. Actual agreements can treat bankruptcy differently, as the historical PICA contract below demonstrates. The example excludes fees, taxes, partial remarketing and changes in accrued-interest funding arrangements.

Bank Bonds: The Borrower’s Debt Continues

Following a bank purchase, the financing documents may apply a separate bank-bond rate, repayment schedule and redemption priority. A facility can therefore solve the tendering holder’s immediate cash need while increasing the borrower’s interest or refinancing pressure. Check whether a shortened repayment schedule applies and when it begins.

A real contract exception: PICA’s May 1, 2008 SBPA for its Series 2008A/B financing, with JPMorgan Chase Bank, applies a contractual Bank Rate to purchased bonds under section 3.01. But section 2.07 expressly says bank bonds are not subject to accelerated amortization solely because they are bank bonds. Sections 2.04 and 3.03 separately govern resale and payment. A higher bank rate and accelerated principal repayment are distinct possibilities, not an inseparable package. ^[4]

The same agreement’s section 7.02(d) preserves purchases despite the Authority’s bankruptcy when no defined automatic suspension or termination event has occurred. Its payment-default trigger also accounts for bond-insurer payment. These historical terms show why a generic list of defaults cannot establish a particular facility’s availability.

Facility Expiry and Early Termination

Scheduled expiry creates a known renewal or replacement task. A transaction may require mandatory tender before expiry or substitution, allowing purchase while support remains available. An immediate termination event can remove the bank’s obligation without that protected exit window.

A dated offering example: Eastern Municipal Water District’s March 21, 2024 Series 2024A official statement, supplemented March 22, describes initial daily-rate bonds and an SBPA scheduled to terminate March 26, 2027, subject to earlier events. It distinguishes tender before specified scheduled facility changes from automatic termination or suspension, for which no mandatory tender occurs. Its SBPA summary lists qualifying payment-default and bankruptcy events among immediate-termination triggers. ^[3]

Those are the offering’s dated descriptions, not confirmation of unchanged current terms. Read the actual facility, amendments and notices together. Distinguish an event requiring notice and time to tender from one that immediately suspends or ends support. Separately assess whether the bank can honor a commitment that remains legally in force.

Why Money Market Funds Can Hold Long-Dated VRDOs

A short effective maturity can arise from contractual rights rather than a short final maturity. Under current Rule 2a-7(i)(3), a long-term variable-rate security with a demand feature uses the longer of the time to its next interest reset and the time until principal can be recovered through demand. A next reset in one day and principal recovery in seven days therefore produce seven days under that rule, not one. ^[2]

This maturity treatment does not establish eligibility by itself. The rule requires a minimal-credit-risk determination, not simply a top short-term rating. For a conditional demand feature, both the feature and underlying security or guarantee must satisfy its eligibility conditions, with a long-maturity exception for the underlying instrument. The fund must assess the risk that exercise becomes unavailable and the required monitoring or notice-and-exercise protections, including substitution notices. Fund diversification, liquidity and continuing credit review remain relevant. ^[2]

The rule’s fund-level limits include 60-day weighted average maturity (WAM) and 120-day weighted average life (WAL); WAL excludes interest-reset shortcuts. These are portfolio constraints, not a bondholder’s tender calendar. The broader money market instruments guide supplies context; compare ultra-short bond funds vs money market funds before treating pooled investments as interchangeable cash accounts.

VRDOs vs Auction-Rate Securities and Floating-Rate Notes

Some floating-rate notes have their own tender structures. Read the provision rather than inferring liquidity from the instrument’s name or reset frequency. The MSRB’s overview distinguishes these structures. ^[1]

How to Evaluate a VRDO

1. Identify the credit: issuer, ultimate obligor, pledged revenues and any separate insurance or guarantee.
2. Write down the clocks: final maturity, active rate mode, next reset, notice cutoff, permitted purchase dates and settlement process.
3. Trace the cash: remarketing proceeds first where required, then the exact available backstop; verify principal and accrued-interest coverage.
4. Read the escape clauses: expiry, replacement, automatic suspension/termination, notice-based termination and mandatory-tender provisions.
5. Stress the arrangement: simultaneous tenders, bank nonperformance, unavailable self-liquidity and the borrower’s bank-rate/repayment exposure.

Common Mistakes

• Calling a weekly reset a weekly maturity. Verify the demand right and purchase date separately.
• Treating the dealer as a guaranteed buyer. Remarketing is a service; a purchase commitment requires its own contractual basis.
• Equating an SBPA with full credit insurance. Purchase liquidity and scheduled debt-service protection cover different obligations.
• Assuming every termination allows an advance tender. Immediate events may remove the purchase commitment first.
• Using a rating as the complete fund-eligibility test. Apply current Rule 2a-7 requirements and ongoing assessment.

Limitations and Remaining Risks

Sources

Official sources read November 13, 2026. The eCFR displayed Title 17 current through November 12. Offering statements and contracts below illustrate their dated provisions; amendments and current facility status must be checked for an actual investment.

1. MSRB: About Municipal Variable Rate Securities (2016), participants, VRDO structures, FRNs and ARS. Historical benchmark and eligibility discussion is not used as current-rule authority.
2. 17 CFR 270.2a-7: Money market funds, especially (a)(6), (a)(11), (d), (g)(3) and (i)(3).
3. Eastern Municipal Water District: Series 2024A Official Statement, March 21, 2024, supplemented March 22; Optional and Mandatory Tender and The Liquidity Facility.
4. PICA: 2008 Bond Issuance Documents, official download index for the large closing binder; execution-copy SBPA dated May 1, 2008, PDF pages 550–596; sections 2.07, 3.01 and 7.02.
5. CDIAC: Debt Financing Guide, 2.3.2.3, Letters of Credit, undated online section.
6. CDIAC: Debt Financing Guide, 2.3.2.4, Lines of Credit and Standby Bond Purchase Agreements, undated online section.
7. MSRB Notice 2012-23, April 30, 2012; Liquidity Facility Type, including self-liquidity.