Stablecoins and what backs them

In short

You have probably heard someone say a stablecoin is just like a dollar, only digital. I want to sit with you on that claim for a moment, because it deserves more than a quick nod. A stablecoin is a type of cryptocurrency designed to hold a steady price, usually one dollar per coin. What holds that price steady depends entirely on the design behind it, and those designs are not all the same. Some designs are sturdy. Some are not.

The whole of it

What it is

A friend of mine once described a stablecoin as a promise written in code. That is a fair way to put it. The coin promises to stay worth roughly one dollar, or one euro, or some other fixed target. It does that by keeping something of value behind it, the way an old bank note was once backed by gold. That something behind it is called collateral, which just means the assets held in reserve to support the promise. Not every stablecoin uses real dollars as collateral. Some use other cryptocurrencies. Some use math and market pressure instead of any collateral at all. Knowing which kind you are looking at matters a great deal.

How it works

I once watched a child hold a balloon on a string and feel very confident about it. The balloon stayed up. The string was the whole point. Stablecoins work on a similar idea. The price stays near one dollar because something keeps pulling it back when it drifts. How that pull works differs by type.

You have probably seen the phrase fiat backed without anyone stopping to explain it. Fiat just means government currency, like dollars. A company holds actual dollars, or very short term government bonds, in a bank or trust. For every coin in circulation, there is supposed to be one dollar sitting in reserve. When you redeem the coin, you get the dollar. The pull back to one dollar is simple and direct. It works as long as the reserves are real and accessible.

A friend of mine who follows this space closely calls the second type the cushioned kind. That type is crypto backed. The reserve is not dollars but other cryptocurrencies, often a well known one like Ether. Because crypto prices move around a lot, these systems hold more collateral than the coins they issue. If a coin is worth one dollar, the system might hold one dollar and fifty cents worth of crypto behind it. That extra cushion is called overcollateralization. It gives the system room to breathe when prices drop.

If you are reading carefully, you may already sense that the third type is the one to watch most closely. It is called algorithmic. There is no real reserve at all. The price is kept near one dollar through automatic rules, usually involving a second coin whose supply expands or contracts to absorb pressure. This is the most fragile design. It depends on people continuing to trust the system and act in certain ways. When trust breaks, the mechanism breaks with it.

The numbers, and where to find yours

If you are holding a stablecoin, the most important number is the reserve ratio. That is the share of coins in circulation that is backed by actual assets. A ratio of one means one dollar of assets for every coin. A ratio below one is a warning sign worth taking seriously. Some issuers publish regular audits, which are independent checks of their books. The word audit gets used loosely in this space. A true audit by a certified public accounting firm is stronger than a simple attestation, which is just a confirmation of a single snapshot. Those are not the same thing.

For fiat backed stablecoins, the two largest issuers publish regular reports on their own websites. Tether publishes reserve breakdowns at tether.to. Circle, which issues USDC, publishes monthly reserve reports at circle.com. Read those directly. Do not rely on a summary someone else wrote. There are no government mandated reserve requirements for stablecoin issuers in the United States as of this writing, though legislation has been proposed. The official place to watch for regulatory updates is the U.S. Department of the Treasury at treasury.gov and the Bank for International Settlements at bis.org for global developments.

No yearly limit or government set percent applies to simply holding a stablecoin the way one applies to a retirement account. So there is no the current figure, which the official source publishes each year placeholder needed here. The numbers that matter are the ones the issuers themselves publish, and you should read them yourself.

A worked example

Meet Clara. She is thirty two years old and works as a graphic designer. She has heard that stablecoins can earn higher interest than a savings account through certain lending platforms. She has 5,000 dollars she wants to park somewhere safe while she thinks over her options.

Clara finds a platform offering 8 percent annual yield on a fiat backed stablecoin. She wants to understand the math before she does anything. If she deposits 5,000 coins and the yield is 8 percent per year, she would earn 400 dollars in interest over twelve months. That is 5,000 multiplied by 0.08. Simple enough.

But Clara is careful. She asks where that 8 percent comes from. The platform tells her it lends her coins to borrowers who pay interest. She then asks to see the reserve report for the stablecoin itself. She goes to the issuer's website and reads the most recent report. She sees the reserve is listed as 100 percent cash and short term U.S. Treasury bills. She notes the date on the report and checks how recent it is.

Clara also asks what happens if the platform itself fails. She learns her coins on the platform are not covered by the Federal Deposit Insurance Corporation, which is the U.S. government program that protects bank deposits up to the current figure, which the official source publishes each year. That is a meaningful difference from a bank account. Clara decides to keep the amount small relative to her total savings. She does not decide here whether to proceed. She uses the math and the facts to think clearly. That is all we are after.

Where it goes wrong

I once heard a man say he lost money on something he thought was safe because he never asked what safe actually meant. That sentence has stayed with me. Stablecoins go wrong in ways that are worth naming plainly.

Reserves can be misrepresented. A company can claim full backing while investing reserves in risky assets. This has happened with some issuers and caused real losses. Read the reserve reports yourself. Do not skip that step.

Algorithmic designs can collapse fast. In May 2022 a widely used algorithmic stablecoin lost nearly all its value in days. The name was TerraUSD. It is a matter of public record. The mechanism that was supposed to hold the price steady ran in reverse and could not recover. Fast is an understatement.

Smart contract risk is real too. Even a well backed stablecoin can be lost if the software holding it has a flaw. Smart contracts are just programs. Programs can have bugs.

A friend who learned this the hard way told me that platform risk and coin risk feel like the same thing until they are not. Even if the coin itself is sound, the platform where you hold it can fail. It has happened. Platforms are not banks. Most are not insured.

Questions to answer before you leave this page

You have enough now to ask the right things, and I hope you will take a moment to ask them honestly before you move on, so let me leave you with this: Can you name what backs the specific stablecoin you are looking at, and have you read the issuer's own reserve report rather than someone else's description of it, and do you know whether that report was a full audit by an accounting firm or just a point in time attestation, and do you understand that yield offered on a stablecoin platform comes with platform risk that is separate from the coin's own design, and do you know whether any of the funds you would put there are covered by government deposit insurance, and finally, does the amount you are considering feel like something you could afford to lose entirely if the worst happened, because that question is the one that tends to get skipped, and it is the one that matters most?