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USDC · Explainer

What is USDC? The regulated US-dollar stablecoin explained

USDC is a US-dollar stablecoin issued by Circle. Each USDC is backed 1:1 by cash and short-duration US Treasuries. Here's how it works and where it fits.

By Eric Nkando, senior writer · 2 min read · Updated 14 Sep 2026
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The facts
Ticker
USDC
Peg
1 USDC = 1 USD
Issuer
Circle Internet Financial
Launched
September 2018
Reserves
Cash + short-duration US Treasury bills (monthly attestations)
Available on
Ethereum, Solana, Base, Arbitrum, Avalanche, Polygon, and many more

Answer first

USDC (USD Coin) is a US-dollar-pegged stablecoin issued by Circle Internet Financial. Every USDC in circulation is backed 1:1 by cash and short-duration US Treasury bills held at regulated US financial institutions. Circle publishes monthly reserve attestations. USDC launched in September 2018 and is available on Ethereum, Solana, Base, Arbitrum, and 15+ other blockchains.

How USDC works

Circle mints new USDC when institutional clients wire dollars to its bank accounts. Redemption works the reverse: institutions send USDC back to Circle and receive dollars. Retail users typically buy and sell USDC on exchanges rather than dealing with Circle directly.

Reserves are:

  • Cash — held at regulated US banks (BlackRock manages a segregated Circle Reserve Fund)
  • Short-duration US Treasury bills — high-quality, highly liquid

Circle publishes:

  • Monthly attestations by Deloitte — a public accountant confirms reserve totals match USDC in circulation
  • Quarterly reserve breakdowns — showing composition and maturities

This is a stronger transparency posture than USDT but still not a full financial audit (attestations verify specific figures at a point in time; audits examine broader financial statements).

Where USDC sits in 2026

USDC is the second-largest stablecoin by market cap, after USDT. Its strongholds are:

  • US-based DeFi — many US-facing protocols default to USDC over USDT
  • Coinbase — USDC is Coinbase's stablecoin (Circle partnered with Coinbase to launch it)
  • Regulated institutional flows — corporate treasuries and funds that need audit-friendly stablecoin exposure choose USDC over USDT
  • Base and Solana — USDC has strong adoption on both

Where USDT still leads

  • Global exchange volume — most non-US exchange trading pairs are USDT-quoted
  • Tron transactions — sub-cent USDT transfers dominate cross-border retail flows
  • Emerging markets — USDT is the de facto USD stand-in in many countries

The March 2023 depeg

The most memorable USDC event: in March 2023, Silicon Valley Bank collapsed. Circle disclosed that ~$3.3B of USDC reserves were held at SVB. USDC briefly traded below $0.90 as markets priced in potential losses. Within days, federal regulators announced they would backstop SVB depositors in full. USDC quickly recovered its peg.

Lessons: no stablecoin is risk-free. Even the most-regulated stablecoin can depeg under banking stress. Circle subsequently diversified reserves across multiple banks and asset classes.

Frequently asked questions

Is USDC backed by real dollars?
Yes. USDC reserves are held in cash at regulated US financial institutions and in short-duration US Treasury bills. Circle publishes monthly attestations by Deloitte. As of recent reports, reserves consistently equal or exceed USDC in circulation.
USDC vs USDT — which should I use?
USDC has stronger regulatory posture: US-regulated issuer (Circle), monthly attestations, cash + short-duration Treasuries only. USDT is larger and more liquid outside the US. For US-based users and DeFi work on US-facing platforms, USDC is often the default; USDT is more common on offshore exchanges.
Has USDC ever depegged?
Yes. In March 2023, following the collapse of Silicon Valley Bank (where Circle held some reserves), USDC briefly traded below $0.90. The peg recovered within days after federal authorities backstopped SVB deposits. Circle subsequently diversified banking relationships.
Can Circle freeze USDC?
Yes. Circle can blacklist USDC addresses in response to law enforcement requests. This is standard for regulated stablecoin issuers.

Sources

  1. Circle — USDC transparency — accessed Sep 14, 2026