Flex Repo or Treasury Portfolio for a Construction Fund?

For a construction fund, a full-flex repurchase agreement and a structured Treasury portfolio are two ways to hold money the project has not spent yet: the repo is a contract claim on a provider, secured by pledged collateral with withdrawal terms negotiated to the schedule, and the portfolio is a ladder of Treasury securities the issuer owns outright, with maturities placed on expected draw dates.

Which fits an issue depends on its permitted investments, its draw schedule and where the issuer wants its credit exposure to sit, and the most common way to price either is competitive bidding run by bidding agents.

Which structure fits which fund?

A repo fits a fund whose spending path is estimated and negotiable, because its defining feature is a set of withdrawal and reinvestment provisions written to that schedule, while a ladder fits a fund whose draw dates are known closely enough to place maturities on them, the match GFOA states as investment duration no longer than the expected drawdown schedule.

Advance refunding escrows sit outside this comparison, since the MSRB glossary says their proceeds are generally invested in Treasury or federal agency securities; the refunding escrow page, the funds hub and the construction fund page cover those cases.

Which structure a particular issue should use is a decision for the issuer with its bond counsel.

How does each structure work?

A repurchase agreement is the sale of a security, or a portfolio of securities, combined with an agreement to repurchase it on a specified future date at a prearranged price, and economically it resembles a collateralized loan, as Federal Reserve researchers describe it in the New York Fed's Economic Policy Review.

The amount by which the collateral's value exceeds the cash advanced is the haircut, in the article's illustration a $95 loan against $100 of collateral.

The flex is in the negotiated terms: Treasury Regulation §1.148-1(b) includes within its guaranteed-investment-contract definition any nonpurpose investment that has specifically negotiated withdrawal or reinvestment provisions and a specifically negotiated interest rate, and those negotiated withdrawal provisions are what a full-flex repo is written to provide.

A structured Treasury portfolio works from the other side of the trade: the issuer buys securities through competitive bids and owns them outright, with maturities placed on the dates the fund expects to pay out and a money market allocation behind the ladder for faster-than-expected spend-down.

Where a draw date is fixed and known years ahead, the ladder can use zero-coupon pieces: TreasuryDirect explains that STRIPS split a fixed-principal Treasury note, bond or TIPS into separate zero-coupon pieces, each paying once at maturity, while bills and floating rate notes cannot be stripped, under 31 CFR 356.31.

The product pages take each structure further: the Flex Repo page works through collateral, custody and withdrawal mechanics, and the Treasury Portfolio page works through the ladder, the sleeve and the bidding.

How do credit, collateral and custody compare?

The two structures get their credit support from different places: the repo's support is a pledge of collateral marked against the cash advanced, and the portfolio's is ownership of the securities themselves.

The public-fund statutes set the collateral minimums where they reach a fund: California requires the market value of the underlying securities to be valued at 102% or greater of the funds borrowed for repos with terms up to one year, adjusted at least quarterly with any shortfall restored by the next business day.

Ohio requires the market value of a written repo's securities to exceed the principal by at least 2%, marked to market daily, in an agreement of 30 days or less, with dealer repos settling delivery-versus-payment and reverse repos prohibited.

Texas requires a fully collateralized repo with a defined termination date, secured by cash, U.S. or agency obligations, or other listed obligations, pledged and held in the entity's name with the entity or an approved third party, and placed through a primary government securities dealer or a financial institution doing business in Texas, with the underlying obligations worth, at disbursement, not less than the principal disbursed.

Where the statutes speak to custody, they put the securities outside the provider's hands: Ohio sends securities acquired under a repo to a qualified trustee, Texas holds the pledge in the entity's name with the entity or an approved third party, and California's provision contemplates delivery by book entry, physical delivery or third-party custodial agreement.

A 1986 statement by the Government Finance Officers Association reaches the same design from the risk side, saying over-collateralization, commonly called haircuts, or marking-to-market practices should be mandatory procedures, and that safekeeping of the underlying securities with the purchaser's custodian significantly reduces risk.

The Federal Reserve researchers also describe tri-party clearing banks that provide collateral management such as daily revaluation and daily remargining, a description of the market as they found it in 2012.

The portfolio has no provider layer to secure; what ownership does not remove is market price, since securities turned into cash before maturity bring the market price of that day, which may be more or less than the price paid.

How does withdrawal flexibility compare?

Withdrawal flexibility is the flex repo's defining term: the provisions that let the issuer take cash as draws arrive are negotiated into the agreement, and the arbitrage definition of a guaranteed investment contract includes any nonpurpose investment with specifically negotiated withdrawal or reinvestment provisions and a specifically negotiated interest rate.

The expected payout path itself is the fund's draw schedule, and the SEC's description of these products as tailored to municipalities' specific collateral and spend-down needs is the same point at market level.

State law keys liquidity to the repurchase schedule where it speaks: New York General Municipal Law §11 treats obligations purchased under a repurchase agreement as payable, for purposes of that paragraph, on the scheduled repurchase date.

Where a general statute caps repo terms, the cap shapes the deal: Ohio's repos under §135.14(E) may not exceed 30 days and California's may not exceed one year, and a 30-day cap is a very different instrument from a multi-year flex repo; which authority a bond fund sits under is a bond counsel question.

The ladder pays liquidity by calendar: cash arrives when maturities land on draw dates, and the money market sleeve is the allocation for faster-than-expected spend-down.

How does yield compare?

Neither structure's return can be quoted in advance, because both are prices set when providers bid: the repo rate is the price of cash lent against collateral, and the portfolio's return comes from the Treasury securities the bids buy.

The repo side is a financing rate: a repo's rate prices the collateralized loan it economically resembles, and SOFR, the New York Fed's broad measure of the cost of borrowing cash overnight collateralized by Treasury securities, measures that overnight collateralized borrowing.

The Treasury side prices off Treasury's own market: the official yield curve Treasury publishes is a par yield curve built from indicative bid-side quotes on the most recently auctioned securities, the market a ladder's maturities are bought out of.

The two prices come from different markets, and the issuer receives what qualified providers bid on the day.

Spending that trails the structure is the concern the negative arbitrage page takes up; GFOA's advice to stage bond issues over the construction period and not issue well before spending begins is aimed at limiting arbitrage liability and negative arbitrage.

mGIC states the priorities for these structures as safety first, then liquidity, then yield, the order the safety, liquidity, yield page sets out.

What differs in compliance and procurement?

Classification and reporting differ on the federal side, statutory authorization differs on the state side, and procurement is the part that works the same way for both structures.

On the federal side, the guaranteed-investment-contract definition in Treasury Regulation §1.148-1(b) includes any nonpurpose investment with specifically negotiated withdrawal or reinvestment provisions and a specifically negotiated interest rate, so a flex repo's tax treatment turns on how its agreement is written.

Form 8038-G (line 36) and Form 8038-T (line 30) ask whether gross proceeds were invested in a guaranteed investment contract and who the provider is, and whether a particular repo is a guaranteed investment contract is a bond counsel determination.

Term length carries its own test: under section 149(g) of the Internal Revenue Code, as summarized in IRS Publication 4079, a bond is a hedge bond unless the issuer reasonably expects that 85% of spendable proceeds will be used within 3 years and that no more than 50% of proceeds is invested in nonpurpose investments whose yield is substantially guaranteed for 4 years or more.

The publication also lists exceptions, including one where 95% is invested in non-AMT tax-exempt bonds, and one pairing a 10%, 30%, 60% and 85% spending schedule over 1, 2, 3 and 5 years with payment of 95% of legal and underwriting costs within 180 days.

Whether any particular instrument's yield is substantially guaranteed is a tax-law determination.

On the state side, authorization runs state by state: Texas writes its repo conditions into §2256.011, California's one-year and 102% terms sit in §53601(j) with a trustee-held carve-out at §53601(m), Ohio's 30-day cap and daily mark sit in §135.14(E), and New York's General Municipal Law §11 recognizes repos by deeming the purchased obligations payable on the repurchase date.

Each of these provisions governs its own state's entities and no other.

Procurement is where the two are treated alike: the same SEC litigation release that describes these products says the most common way to establish fair market value is competitive bidding run by bidding agents, which means bid specifications, solicitation of qualified providers, and comparison of bids on rate and non-rate terms, a Bidding Agent's work covered at the bidding hub.

The fair-market-value safe harbor in the arbitrage rules carries conditions of its own, set out at the safe harbor page.

An independent Bidding Agent can compare bids on your proceeds for either structure, and mGIC's fee is paid by the winning provider rather than the issuer, at or below the safe-harbor maximum in the Treasury arbitrage regulations, and disclosed.

Decision table

The table collects the comparison; read it against the fund's own permitted investments and draw schedule.

mGIC is an independent, SEC-registered municipal advisor that sells no proprietary product, does not act as principal, and owes its municipal clients a fiduciary duty.

If a fund already holds one of the two structures and the draws have drifted away from it, mGIC offers a free, no-obligation reinvestment review.

Final determinations about which structure an issue can use, and how each is classified, belong to bond counsel and tax counsel.

Last updated 2026-10-06.

This page is general educational information about municipal finance and federal and state rules as of the date shown. It is not legal, tax or investment advice, and it is not a recommendation about any particular investment. Product availability, legality and suitability depend on the issuer, jurisdiction, governing documents and transaction-specific facts. Final legal and tax determinations remain with the issuer's bond counsel, tax counsel and other advisors.