How do stablecoins keep their value?

Most are backed by reserves of cash and short-term government debt; others use crypto collateral or algorithms. The quality of the backing is what matters.

Can a stablecoin lose its peg?

Yes. Concerns about reserves or a run of redemptions can push the price below $1, sometimes briefly, sometimes permanently.

Guide · Markets

What Is a Stablecoin? Crypto Designed Not to Move

Q: What is a stablecoin?

A cryptocurrency designed to hold a steady value, usually one US dollar, so it can be used to move money in and out of crypto trading.

Most crypto is famous for volatility. Stablecoins are built to do the opposite — and when one briefly fails at that one job, it becomes one of the more revealing stress tests in the entire market.

Sep 17, 2026

A stablecoin is a cryptocurrency designed to hold a stable value, almost always pegged 1:1 to a traditional currency like the US dollar. Unlike Bitcoin or Ethereum, the goal isn't price appreciation — it's predictability, which makes stablecoins useful as a way to move value between exchanges, hold cash-equivalent balances on-chain, or trade in and out of volatile assets without converting back to a traditional bank account each time.

The peg is maintained differently depending on the stablecoin's design. Fiat-backed stablecoins hold real dollar reserves (in cash or short-term government debt) equal to the coins in circulation, redeemable roughly 1:1. Crypto-collateralized stablecoins back their peg with other cryptocurrencies, usually over-collateralized to absorb price swings in the collateral itself. Algorithmic stablecoins attempt to maintain the peg through automated supply adjustments rather than holding reserves at all — a design that has historically proven the least reliable of the three.

A 'depeg' is what happens when a stablecoin's price meaningfully breaks away from its intended $1.00 value, and it's treated as a serious event precisely because it isn't supposed to happen at all. A depeg driven by reserve concerns (a scare about whether the backing assets are actually accessible) tends to resolve once those reserves are confirmed or guaranteed; a depeg caused by a fundamentally broken algorithmic design has historically proven far harder to recover from.

Trade2Spike's Historical Replay includes real depeg events precisely because they're such a clean, visual lesson in the difference between 'volatile but working as designed' and 'the mechanism itself failing' — a distinction that matters far more once real capital is on the line than it does watching from the sidelines.