Stablecoins Aren’t ‘Digital Dollars’—They’re Short-Term Treasury Megafunds: The New Yield Loophole Banks Are Fighting (and why it could reshape your checking account by 2027)
USDC and USDT don’t run on piles of cash—they run on rolling T-bills and repo that generate real yield. The token stays at $1, but the portfolio underneath (and who captures the interest) is the real story.
By TheMurrow Editorial
May 24, 2026
Key Points
- 1Reframe stablecoins: USDC and USDT are issuer liabilities backed by rolling T-bills and repo—not “digital cash” in a vault.
- 2Follow the yield: reserve portfolios earn meaningful interest (e.g., USDXX ~3.51% 7-day SEC yield) while passive token holders usually get none.
- 3Compare structures, not logos: USDC’s Treasury/repo-heavy, money-market-linked design differs from USDT’s broader mix that can add credit and price risk.
Stablecoins sell a comforting story: a digital token that behaves like a dollar, usable anywhere on the internet, immune to the friction and fees of legacy finance.
The balance sheets behind the biggest stablecoins tell a different story. For the two dominant U.S. dollar stablecoins—Tether (USDT) and Circle (USDC)—the economic engine is not stacks of cash sitting idle. It is short-dated U.S. Treasuries and Treasury-backed repo, held at scale, rolling constantly, and throwing off yield.
That difference matters because it changes what a stablecoin really is. Less “digital cash,” more like a privately issued claim on a short-term Treasury portfolio—a structure closer in spirit to a money market product than to a checking account.
“A stablecoin isn’t a dollar in a vault. It’s a liability backed by a yield-bearing Treasury machine.”
— — TheMurrow Editorial
The question isn’t whether that machine can be useful. It already is. The question is whether policymakers, markets, and ordinary users are being honest about what they’re holding—and what they’re not.
Stablecoins aren’t “digital dollars.” They’re claims on reserves.
Stablecoins are typically marketed as simple: you give an issuer one U.S. dollar, you receive one token, and you can redeem it later for one dollar. That mental model implies a warehouse—cash in, cash out, nothing to see.
The reserve disclosures for major issuers point elsewhere. Circle states that USDC reserves may be held in U.S. Treasuries and overnight reverse repo, in custodial or managed accounts, and within a government money market fund structure tied to the Circle Reserve Fund managed by BlackRock. Circle also reports monthly third‑party assurance by a Big Four firm. (Circle transparency disclosures)
Tether, meanwhile, publishes quarterly attestations by BDO Italia and is widely described—based on those attestations and secondary summaries—as holding a large share of reserves in Treasury bills, alongside other categories such as reverse repo, loans, precious metals, and bitcoin. (Tether attestations; secondary summary via Eco)
That sounds like plumbing, not philosophy. Yet the plumbing drives the core reality: the stablecoin token is typically an issuer liability. The user holds a claim whose safety depends on reserve quality, liquidity, and governance.
The reserve disclosures for major issuers point elsewhere. Circle states that USDC reserves may be held in U.S. Treasuries and overnight reverse repo, in custodial or managed accounts, and within a government money market fund structure tied to the Circle Reserve Fund managed by BlackRock. Circle also reports monthly third‑party assurance by a Big Four firm. (Circle transparency disclosures)
Tether, meanwhile, publishes quarterly attestations by BDO Italia and is widely described—based on those attestations and secondary summaries—as holding a large share of reserves in Treasury bills, alongside other categories such as reverse repo, loans, precious metals, and bitcoin. (Tether attestations; secondary summary via Eco)
That sounds like plumbing, not philosophy. Yet the plumbing drives the core reality: the stablecoin token is typically an issuer liability. The user holds a claim whose safety depends on reserve quality, liquidity, and governance.
The “megafund” metaphor—and why it fits
When tens of billions of dollars are invested in short-term government paper, a stablecoin begins to resemble a short-term Treasury megafund with a payments wrapper.
USDC provides the clearest window into this framing because a significant portion of its reserves are connected to a regulated money market fund vehicle. BlackRock’s page for the Circle Reserve Fund (ticker: USDXX) looks like what it is: a government money market fund interface. It carries standard warnings (“not a bank account,” not FDIC-insured) and reports fund metrics that cash investors recognize. (BlackRock fund page)
None of this makes stablecoins inherently suspect. It does, however, make their risk profile and political economy different from the “digital dollar” story.
USDC provides the clearest window into this framing because a significant portion of its reserves are connected to a regulated money market fund vehicle. BlackRock’s page for the Circle Reserve Fund (ticker: USDXX) looks like what it is: a government money market fund interface. It carries standard warnings (“not a bank account,” not FDIC-insured) and reports fund metrics that cash investors recognize. (BlackRock fund page)
None of this makes stablecoins inherently suspect. It does, however, make their risk profile and political economy different from the “digital dollar” story.
“Stablecoins look like money at checkout—but they behave like portfolios underneath.”
— — TheMurrow Editorial
USDC’s reserves: a money-market structure in plain sight
Circle has leaned into transparency as a competitive advantage, publishing reserve details and describing the instruments it uses. As of May 21, 2026, Circle states that reserves may be held in:
- U.S. Treasuries
- Overnight reverse repo
- Structures including custodial accounts, managed accounts, and the Circle Reserve Fund (Circle disclosures)
The Circle Reserve Fund itself is managed by BlackRock and is organized under SEC Rule 2a‑7 for government money market funds—an important detail because 2a‑7 funds operate under strict constraints on liquidity, maturity, and eligible assets.
BlackRock’s fund page offers unusually concrete, continuously updated data for something that many users treat as “just dollars.” As of May 21, 2026, the Circle Reserve Fund reported:
- 7‑Day SEC Yield: ~3.51%
- Weighted Average Maturity (WAM): ~11 days
- Fund size: ~$65.2B (Institutional Shares)
(BlackRock, Circle Reserve Fund page)
Those statistics make the “megafund” label feel less like rhetoric and more like arithmetic. A WAM around 11 days signals a portfolio designed to stay liquid and rate-sensitive—constantly rolling short-term government exposure. A 7-day SEC yield around 3.51% makes the economics legible: there is meaningful interest income being generated by the reserves.
- U.S. Treasuries
- Overnight reverse repo
- Structures including custodial accounts, managed accounts, and the Circle Reserve Fund (Circle disclosures)
The Circle Reserve Fund itself is managed by BlackRock and is organized under SEC Rule 2a‑7 for government money market funds—an important detail because 2a‑7 funds operate under strict constraints on liquidity, maturity, and eligible assets.
BlackRock’s fund page offers unusually concrete, continuously updated data for something that many users treat as “just dollars.” As of May 21, 2026, the Circle Reserve Fund reported:
- 7‑Day SEC Yield: ~3.51%
- Weighted Average Maturity (WAM): ~11 days
- Fund size: ~$65.2B (Institutional Shares)
(BlackRock, Circle Reserve Fund page)
Those statistics make the “megafund” label feel less like rhetoric and more like arithmetic. A WAM around 11 days signals a portfolio designed to stay liquid and rate-sensitive—constantly rolling short-term government exposure. A 7-day SEC yield around 3.51% makes the economics legible: there is meaningful interest income being generated by the reserves.
~3.51%
7‑day SEC yield reported for BlackRock’s Circle Reserve Fund (USDXX) as of May 21, 2026—evidence the reserves throw off meaningful interest income.
~11 days
Weighted Average Maturity (WAM) for USDXX as of May 21, 2026—signals a constantly rolling, highly liquid short‑term government portfolio.
~$65.2B
Approximate Circle Reserve Fund size (Institutional Shares) reported on BlackRock’s fund page as of May 21, 2026—illustrates the ‘megafund’ scale.
Who gets the yield?
The issuer or reserve structure captures the Treasury and repo yield. Typical stablecoin holders do not automatically receive it merely by holding USDC or USDT in a wallet.
That gap—yield earned on reserves versus yield paid to token holders—has become one of the most important and least discussed features of modern stablecoins. It helps explain why issuers can build large businesses around a product that, on the surface, is a simple one-for-one claim.
The public debate often gets stuck on whether a stablecoin is “fully backed.” The sharper question is: fully backed by what, marked how, and who benefits from the cashflow?
That gap—yield earned on reserves versus yield paid to token holders—has become one of the most important and least discussed features of modern stablecoins. It helps explain why issuers can build large businesses around a product that, on the surface, is a simple one-for-one claim.
The public debate often gets stuck on whether a stablecoin is “fully backed.” The sharper question is: fully backed by what, marked how, and who benefits from the cashflow?
Key Insight
Stablecoins can be “fully backed” and still be economically asymmetric: reserves earn Treasury/repo yield while passive holders typically receive none of it.
USDT’s reserve mix: big Treasury exposure, plus meaningful complexity
Tether’s USDT dominates much of offshore crypto trading and cross-border usage. Its reserve story is not a carbon copy of USDC’s.
Secondary summaries of Tether’s reserve disclosures describe a reserve base heavily weighted to Treasury bills, but also containing non-Treasury assets—including references to gold, bitcoin, and secured loans—which introduce market-price and credit-risk exposures that do not map neatly onto “cash equivalents.” (Eco summary; readers should consult the underlying Tether attestations for exact composition)
That distinction matters. A portfolio of T-bills and overnight repo is designed to behave like cash under stress. Add loans or volatile assets and you add risk channels that can become relevant precisely when redemptions spike.
Federal Reserve staff research has elevated the “what’s in the box?” question to a policy concern, comparing reserve compositions across major issuers and examining implications for deposits, credit, and financial intermediation. (Federal Reserve, FEDS Notes, Dec. 17, 2025)
Secondary summaries of Tether’s reserve disclosures describe a reserve base heavily weighted to Treasury bills, but also containing non-Treasury assets—including references to gold, bitcoin, and secured loans—which introduce market-price and credit-risk exposures that do not map neatly onto “cash equivalents.” (Eco summary; readers should consult the underlying Tether attestations for exact composition)
That distinction matters. A portfolio of T-bills and overnight repo is designed to behave like cash under stress. Add loans or volatile assets and you add risk channels that can become relevant precisely when redemptions spike.
Federal Reserve staff research has elevated the “what’s in the box?” question to a policy concern, comparing reserve compositions across major issuers and examining implications for deposits, credit, and financial intermediation. (Federal Reserve, FEDS Notes, Dec. 17, 2025)
A practical way to think about USDT vs USDC
For readers deciding how to interpret the market, the useful comparison is not branding—it is balance-sheet design.
- USDC: Reserve framing explicitly tied to Treasuries and overnight repo, with a visible connection to a government money market fund structure (Circle/BlackRock disclosures).
- USDT: Large Treasury exposure, but with additional reserve categories that can carry credit and market-price risk (Tether attestation; secondary summaries).
Neither profile is equivalent to an FDIC-insured bank deposit. Both are better understood as private claims whose stability depends on liquidity management and asset quality.
- USDC: Reserve framing explicitly tied to Treasuries and overnight repo, with a visible connection to a government money market fund structure (Circle/BlackRock disclosures).
- USDT: Large Treasury exposure, but with additional reserve categories that can carry credit and market-price risk (Tether attestation; secondary summaries).
Neither profile is equivalent to an FDIC-insured bank deposit. Both are better understood as private claims whose stability depends on liquidity management and asset quality.
USDC vs USDT (how to read the difference)
Before
- USDC — Treasuries and overnight repo emphasis; visible tie to BlackRock-managed government money market fund structure; monthly Big Four assurance
After
- USDT — large T-bill exposure plus additional categories (e.g.
- loans
- references to gold/bitcoin); quarterly attestations; added credit/market-price risk channels
“Two tokens can trade at $1 and still carry very different kinds of risk.”
— — TheMurrow Editorial
The BIS critique: why stablecoins fail key tests of “money”
Stablecoins feel like money because they are used for payments, trading, and settlement. The Bank for International Settlements (BIS) pushes back on the idea that this functional resemblance makes them good monetary anchors.
In its framing, stablecoins behave more like financial assets than like true money. The BIS argues they fail tests it considers foundational for a monetary system: singleness, elasticity, integrity. (BIS Annual Report chapter, 2025)
Those terms can sound academic. Translated into everyday stakes:
- Singleness: One unit of money should be accepted at par everywhere. Stablecoins can fragment into multiple “dollars,” each with its own issuer risk and market pricing.
- Elasticity: The system should expand and contract liquidity smoothly to meet demand, especially in stress. Stablecoins depend on private redemption mechanisms and market confidence.
- Integrity: Strong safeguards against illicit finance and operational abuse are not optional in a monetary base layer; they are core to legitimacy.
The BIS critique isn’t simply anti-crypto. It is a reminder that money is a public good with infrastructure expectations: resilience, uniformity, and governance.
In its framing, stablecoins behave more like financial assets than like true money. The BIS argues they fail tests it considers foundational for a monetary system: singleness, elasticity, integrity. (BIS Annual Report chapter, 2025)
Those terms can sound academic. Translated into everyday stakes:
- Singleness: One unit of money should be accepted at par everywhere. Stablecoins can fragment into multiple “dollars,” each with its own issuer risk and market pricing.
- Elasticity: The system should expand and contract liquidity smoothly to meet demand, especially in stress. Stablecoins depend on private redemption mechanisms and market confidence.
- Integrity: Strong safeguards against illicit finance and operational abuse are not optional in a monetary base layer; they are core to legitimacy.
The BIS critique isn’t simply anti-crypto. It is a reminder that money is a public good with infrastructure expectations: resilience, uniformity, and governance.
The counterpoint: stablecoins as a useful bridge
Stablecoin advocates would argue the BIS sets the bar for “money” at central-bank level while users often want something else: cheap, fast, global settlement in a digital environment.
Even if stablecoins aren’t ideal monetary anchors, they may still be valuable instruments—especially in jurisdictions with weak banking access or expensive international transfers. The point is not to deny utility. It is to label the instrument correctly so users can judge trade-offs.
Even if stablecoins aren’t ideal monetary anchors, they may still be valuable instruments—especially in jurisdictions with weak banking access or expensive international transfers. The point is not to deny utility. It is to label the instrument correctly so users can judge trade-offs.
Editor’s Note
The dispute isn’t “useful or useless.” It’s whether the instrument is described honestly: a private claim on a reserve portfolio, not public money.
The IMF view: stablecoins as Treasury-and-repo vehicles at scale
The International Monetary Fund (IMF) has also emphasized that large stablecoins are backed “mostly” by short-term Treasuries and repo-type instruments, with variations by issuer. (IMF analysis, Dec. 2025)
That observation is easy to gloss over. It is also the hinge of the entire story.
When private tokens become large holders of short-term government paper, they are no longer simply “crypto infrastructure.” They become part of the demand base for U.S. government funding at the front end of the curve. They also become sensitive to interest-rate cycles: higher short rates increase reserve yield; rapid shifts can test liquidity management and redemption dynamics.
That observation is easy to gloss over. It is also the hinge of the entire story.
When private tokens become large holders of short-term government paper, they are no longer simply “crypto infrastructure.” They become part of the demand base for U.S. government funding at the front end of the curve. They also become sensitive to interest-rate cycles: higher short rates increase reserve yield; rapid shifts can test liquidity management and redemption dynamics.
A real-world case study: reading USDC through USDXX
The Circle Reserve Fund data offer a rare case study in how stablecoin reserves can resemble institutional cash management.
As of May 21, 2026, USDXX shows a ~3.51% 7-day SEC yield and ~11 days WAM, with ~$65.2B in assets (Institutional Shares). (BlackRock)
Those numbers tell a story: the reserves are positioned to stay liquid and to harvest short-term rates. For users, the implication is sobering and clarifying: holding USDC is not the same as holding a bank deposit, even if the token price is stable. It is closer to holding a private claim whose backing instruments resemble what cash funds hold.
As of May 21, 2026, USDXX shows a ~3.51% 7-day SEC yield and ~11 days WAM, with ~$65.2B in assets (Institutional Shares). (BlackRock)
Those numbers tell a story: the reserves are positioned to stay liquid and to harvest short-term rates. For users, the implication is sobering and clarifying: holding USDC is not the same as holding a bank deposit, even if the token price is stable. It is closer to holding a private claim whose backing instruments resemble what cash funds hold.
Who bears the risk, and what “stable” actually means
“Stable” describes the price target, not the guarantee.
A fiat-backed stablecoin can trade at $1 while still carrying:
- Issuer and governance risk (the token is a liability)
- Liquidity risk (can reserves be sold or financed quickly under stress?)
- Operational and legal risk (custody arrangements, redemption terms, jurisdiction)
- Asset risk (the quality and volatility of non-Treasury holdings, where applicable)
USDC’s reserve framing looks intentionally designed to minimize asset risk by emphasizing government-backed instruments and repo. USDT’s broader mix may support profitability and flexibility but introduces different exposures. (Circle disclosures; secondary summaries of Tether reserves)
The Federal Reserve’s December 2025 research underscores why regulators care: stablecoins can influence deposits and the shape of financial intermediation, even if they sit outside traditional banking charters. (Federal Reserve FEDS Notes, Dec. 17, 2025)
A fiat-backed stablecoin can trade at $1 while still carrying:
- Issuer and governance risk (the token is a liability)
- Liquidity risk (can reserves be sold or financed quickly under stress?)
- Operational and legal risk (custody arrangements, redemption terms, jurisdiction)
- Asset risk (the quality and volatility of non-Treasury holdings, where applicable)
USDC’s reserve framing looks intentionally designed to minimize asset risk by emphasizing government-backed instruments and repo. USDT’s broader mix may support profitability and flexibility but introduces different exposures. (Circle disclosures; secondary summaries of Tether reserves)
The Federal Reserve’s December 2025 research underscores why regulators care: stablecoins can influence deposits and the shape of financial intermediation, even if they sit outside traditional banking charters. (Federal Reserve FEDS Notes, Dec. 17, 2025)
Practical takeaway: treat stablecoins like financial products, not cash
For readers using stablecoins in trading, remittances, or on-chain commerce, the pragmatic stance is neither panic nor blind faith. It is product literacy.
Ask questions that would sound normal in any other corner of finance:
- What are the reserves, exactly?
- How often are they reported and assured?
- Who are the custodians and managers?
- What are the redemption terms under stress?
- Does the structure concentrate risk in one issuer?
Ask questions that would sound normal in any other corner of finance:
- What are the reserves, exactly?
- How often are they reported and assured?
- Who are the custodians and managers?
- What are the redemption terms under stress?
- Does the structure concentrate risk in one issuer?
Stablecoin literacy checklist
- ✓Identify the reserves (Treasuries/repo vs. other assets)
- ✓Check disclosure cadence and assurance/attestation quality
- ✓Confirm custodians, managers, and legal structure
- ✓Read redemption terms—especially under stress
- ✓Map concentration risk to a single issuer or jurisdiction
What this means for ordinary users—and for markets
Stablecoins’ rise has created a strange split-screen reality. On your phone, a stablecoin looks like cash. In the backend, it looks like a rolling book of Treasuries and repo.
That split matters differently depending on who you are.
That split matters differently depending on who you are.
If you’re a user: convenience comes with a hidden trade
Stablecoins can offer speed and portability. The trade is that you accept a private issuer’s promise and the mechanics of its reserve management.
Users should internalize three facts supported by the public disclosures:
- Major stablecoins’ backing is dominated by short-term government instruments, not physical cash. (IMF 2025; Circle disclosures)
- At least in USDC’s case, reserve management links to a government money market fund with standard warnings like not FDIC-insured. (BlackRock)
- Reserve portfolios generate yield—~3.51% 7-day SEC yield for USDXX as of May 21, 2026—that does not automatically flow to token holders. (BlackRock)
Users should internalize three facts supported by the public disclosures:
- Major stablecoins’ backing is dominated by short-term government instruments, not physical cash. (IMF 2025; Circle disclosures)
- At least in USDC’s case, reserve management links to a government money market fund with standard warnings like not FDIC-insured. (BlackRock)
- Reserve portfolios generate yield—~3.51% 7-day SEC yield for USDXX as of May 21, 2026—that does not automatically flow to token holders. (BlackRock)
If you’re watching the system: stablecoins are becoming front-end Treasury players
A stablecoin sector measured in the hundreds of billions (industry estimates cite $235B+ in early 2026, though readers should treat that as a snapshot requiring corroboration from primary market data) becomes a meaningful buyer of T-bills and repo. (Industry explainer via Eco; corroboration recommended)
That can tighten the links between crypto demand and short-term funding markets. It also means policy decisions—about stablecoin regulation, reserve constraints, and disclosure—can have knock-on effects beyond crypto trading venues.
The debate should not be reduced to slogans. Stablecoins can be both: useful tools and growing macro-relevant funds.
That can tighten the links between crypto demand and short-term funding markets. It also means policy decisions—about stablecoin regulation, reserve constraints, and disclosure—can have knock-on effects beyond crypto trading venues.
The debate should not be reduced to slogans. Stablecoins can be both: useful tools and growing macro-relevant funds.
$235B+
Industry estimates for stablecoin sector size in early 2026 (snapshot; corroboration recommended). At this scale, issuers can become meaningful T-bill and repo buyers.
The honest label: stablecoins as privately issued Treasury wrappers
Calling stablecoins “digital dollars” flatters the product and blurs the responsibilities. A dollar is public money; a stablecoin is a private claim designed to track the dollar.
The “short-term Treasury megafund” label is not perfect, but it is clarifying. It forces the right questions: What are the assets? Who manages them? What rules apply? Who absorbs losses if something breaks?
Circle’s disclosures and BlackRock’s fund metrics make the structure visible. Tether’s attestations and reserve categories show a model that includes Treasuries but extends beyond them. The BIS and IMF provide the institutional critique: stablecoins behave like assets and raise hard questions about monetary integrity and resilience. (Circle; BlackRock; BIS; IMF)
The stablecoin story is often told as a battle between old finance and new finance. A more accurate framing is simpler: stablecoins are finance—just compressed, digitized, and wrapped in a token.
Readers deserve that clarity. Markets eventually demand it.
The “short-term Treasury megafund” label is not perfect, but it is clarifying. It forces the right questions: What are the assets? Who manages them? What rules apply? Who absorbs losses if something breaks?
Circle’s disclosures and BlackRock’s fund metrics make the structure visible. Tether’s attestations and reserve categories show a model that includes Treasuries but extends beyond them. The BIS and IMF provide the institutional critique: stablecoins behave like assets and raise hard questions about monetary integrity and resilience. (Circle; BlackRock; BIS; IMF)
The stablecoin story is often told as a battle between old finance and new finance. A more accurate framing is simpler: stablecoins are finance—just compressed, digitized, and wrapped in a token.
Readers deserve that clarity. Markets eventually demand it.
T
About the Author
TheMurrow Editorial is a writer for TheMurrow covering business & money.
Frequently Asked Questions
Are USDC and USDT actually backed by U.S. dollars?
Reserve disclosures indicate backing is largely cash-equivalent instruments, especially short-term U.S. Treasuries and Treasury-backed repo, rather than literal piles of cash. Circle describes reserves held in Treasuries and overnight reverse repo, including via the BlackRock-managed Circle Reserve Fund. Tether’s attestations show large Treasury exposure alongside other categories. The “backing” is real, but it is portfolio-based.
What does it mean that USDC is linked to a money market fund?
Circle states that reserves may be held in the Circle Reserve Fund (USDXX), a government money market fund managed by BlackRock under SEC Rule 2a‑7. BlackRock’s fund page publishes metrics like 7-day SEC yield and weighted average maturity, and it emphasizes standard money-market disclaimers such as not FDIC-insured and not a bank account.
Who earns the interest on stablecoin reserves?
The reserve assets (Treasuries/repo) generate yield. For example, BlackRock reported the Circle Reserve Fund at about ~3.51% 7-day SEC yield as of May 21, 2026. Typical stablecoin holders do not automatically receive that yield simply by holding tokens. The economics generally accrue to the issuer and the reserve structure, not to passive wallet holders.
Is USDT riskier than USDC?
They are structured differently. Public descriptions of Tether’s reserves include substantial Treasury bills plus other categories such as loans and references to gold/bitcoin, which can introduce credit and market-price risk. Circle emphasizes Treasuries and overnight repo and provides monthly Big Four assurance. “Riskier” depends on what risks you mean—asset mix, transparency cadence, governance, and redemption mechanics all matter.
Why do the BIS and IMF care about stablecoins?
The BIS argues stablecoins behave more like financial assets than money and fail key tests—singleness, elasticity, integrity—needed for a robust monetary system. The IMF notes that large stablecoins are mostly backed by Treasuries and repo, making them significant financial actors in short-term markets. Both institutions focus on systemic resilience, integrity, and spillovers beyond crypto.
Should I treat stablecoins like a bank account?
No. Disclosures around reserve funds explicitly warn they are not bank accounts and not FDIC-insured. Stablecoins are generally issuer liabilities backed by reserve portfolios. They can be useful settlement tools, but they do not provide the same legal protections or guarantees as insured deposits. Users should treat them as financial products with specific counterparties and structures.
