Stablecoins are cryptocurrency tokens designed to maintain a fixed value, typically pegged 1:1 to the US dollar. Reserve backing is the mechanism behind that peg: the actual assets held to support each token in circulation. This article explains how stablecoins work, what reserve backing means in practice, and what to verify before using one.
What is a stablecoin?
What is a stablecoin?
A stablecoin is a cryptocurrency token designed to hold a constant price, most often equal to one US dollar.
Unlike Bitcoin or Ethereum, whose prices shift with market demand, a stablecoin targets a fixed value. The most widely used stablecoins are USDT (Tether), USDC (Circle), and DAI. USDT and USDC are fiat-backed, meaning each token is meant to be supported by cash or cash-equivalent reserves held by the issuer. DAI uses a different approach: it is issued against crypto deposits worth more than the tokens created, rather than fiat currency (traditional currency like the US dollar) held by a central issuer.
Stablecoins are used across the crypto ecosystem for trading, cross-border transfers, earning yield in decentralised finance (DeFi) platforms, and settling payments without converting back to fiat. On centralised exchanges, stablecoin pairs let traders move between volatile assets without leaving crypto.
A third category exists: algorithmic stablecoins. These use automated mechanisms, such as creating and destroying tokens in response to demand, to try to hold a peg. They do not rely on asset reserves the same way fiat-backed stablecoins do.
What are real-world assets (RWA) in crypto?
Understand how different types of crypto tokens are backed by real-world assets and what that means for holders.
How does reserve backing work?
How does reserve backing work?
Reserve backing means the issuer holds real assets equal in value to the tokens it has issued.
For a fiat-backed stablecoin like USDC, Circle holds US dollars, Treasury bills, or other short-term instruments in regulated financial institutions. When you buy 100 USDC, the issuer is meant to hold $100.00 in reserve. When you redeem it, those reserves fund the payout. The peg holds as long as the reserves are real, sufficient, and accessible.
The quality and transparency of those reserves vary across issuers. Some hold purely cash and short-term government securities. Others have historically held a mix including commercial paper (short-term corporate debt) and other instruments that carry more credit risk. This distinction matters when conditions tighten.
Attestations are regular statements from an accounting firm confirming that reserves exist at a point in time. A full audit is a more rigorous review of how those reserves are held and whether the accounting is accurate. Most stablecoin issuers publish attestations. Full audits are less common.
What to check before using a stablecoin
What to check before using a stablecoin
Not every stablecoin carries the same risk. A few things to look at before using one.
Reserve transparency: Does the issuer publish regular reserve reports? Are they attested by a recognised accounting firm? How often are they published? USDC publishes monthly attestations. USDT has faced scrutiny over the composition of its reserves and has improved disclosure over time.
Asset quality: Cash is the safest reserve asset. Short-term US Treasury bills are close behind. Commercial paper, corporate bonds, and loans introduce credit risk. Check the reserve composition before assuming a stablecoin is fully backed by cash.
Redeemability: Can you redeem the stablecoin directly with the issuer for fiat currency? USDC allows direct redemption through Circle's platform. Many retail users interact with stablecoins only through exchanges, which adds a layer between the holder and the issuer. Know the path your redemption actually takes.
Regulatory status: Fiat-backed stablecoins issued by regulated entities in the US, EU, or UK operate under growing regulatory frameworks. Stablecoins issued outside regulated jurisdictions carry more issuer-specific risk.
Keep reading
FAQ
Are all stablecoins backed the same way?
No. Fiat-backed stablecoins like USDC and USDT hold cash or cash-equivalent assets. Crypto-backed stablecoins like DAI are issued against crypto deposits worth more than the tokens created. Algorithmic stablecoins use code-driven mechanisms and hold no direct reserves. Each type carries a different risk profile.
What happens if a stablecoin loses its peg?
A stablecoin loses its peg when confidence in the backing breaks down, reserves are insufficient, or a stabilisation mechanism fails. Prices fall sharply and redemptions often stop or become delayed. The 2022 UST collapse is the most cited example, though it was algorithmic rather than reserve-backed.
Do stablecoins pay interest?
Stablecoins themselves do not pay interest. Crypto lending platforms that lend your stablecoins to borrowers, or protocols that deploy them into liquidity strategies, pay a yield. That yield comes from the activity the stablecoins are used in, not from the token itself.
Products and features listed may be subject to change and are not a commitment to deliver any material, code, or functionality. We reserve the right to amend, cancel, or suspend any features or products without prior notice to you.