Spain
Mexico
Brazil
Poland
Taiwan
Philippines
South Korea
The essentials
- A dollar peg targets a dollar price; it does not guarantee purchasing power in a different currency.
- In an arbitrary example, 100 USDC falls from KRW 130,000 to KRW 120,000 when USD/KRW moves from 1,300 to 1,200.
- Token price, conversion terms, and the final amount available to spend are three distinct things.
Name the currency in which stability matters
A dollar-pegged stablecoin aims to track the U.S. dollar. If your bills are in another currency, you still have exposure to that currency’s exchange rate against the dollar. Applying the general principle of currency risk, a steady dollar token price can coexist with a rising or falling value in your household budget.
Keep three quantities separate: how many tokens you hold, their dollar market value, and their value in the currency you spend. None alone describes all three. Even a perfectly maintained dollar peg would not freeze local prices or purchasing power; inflation can also change what a given amount of money buys.
A worked example with arbitrary exchange rates
Assume you hold 100 USDC and, solely for this calculation, each USDC remains worth exactly USD 1. Use arbitrary exchange rates of KRW 1,300 per dollar at the start and KRW 1,200 later. These are invented teaching inputs, not current quotes or a forecast. Ignore fees, spreads, taxes, rewards, and changes in token quantity.
The initial value is 100 × 1 × 1,300 = KRW 130,000. The later value is 100 × 1 × 1,200 = KRW 120,000. The change is −10,000 / 130,000 = −7.6923%, rounded to −7.69%. No dollar depeg is needed for that loss in won. A move in the opposite direction could increase the won value, before costs.
| Hypothetical point | USD value of 100 USDC | Arbitrary KRW per USD | Value before costs |
|---|---|---|---|
| Start | USD 100 | 1,300 | KRW 130,000 |
| Later | USD 100 | 1,200 | KRW 120,000 |
| Change | USD 0 | −100 | −KRW 10,000 (−7.69%) |
The peg and your conversion quote are different
The general valuation formula is token quantity × dollars per token × home-currency units per dollar. A change in either price can alter the result. If the token departs from its peg, that adds another source of variation alongside the foreign-exchange movement; the two effects multiply rather than simply cancel by assumption.
A target redemption value is also different from an executable market quote. Direct redemption can have eligibility and operational conditions, while holders selling through an intermediary use that intermediary’s available route and pricing. A dashboard estimate or a widely quoted reference rate is therefore not necessarily the amount a specific transaction will deliver.
From a token balance to money you can spend
A payment or cash-out route may involve token sale, currency conversion, a transfer, and settlement. The relevant questions are which currency is charged, when each conversion rate is fixed, and which costs apply. A fee shown as zero for one step does not establish that every step, including the exchange-rate spread, is costless.
A card interface can combine several steps, so inspect the product’s actual terms and transaction record rather than infer them from the stablecoin name. Access matters too: custody arrangements, withdrawal processing, or service limits can affect whether funds are usable when a bill is due, even if displayed prices remain stable.
Measure the result against the same starting point
For a fair calculation, record the total home-currency amount paid to acquire the tokens and the net amount received or spent at exit. Keep added deposits, withdrawals, and separately paid costs visible. If rewards increase the token count, calculate their contribution separately before combining it with token-price and exchange-rate changes.
These distinctions explain why an unchanged token balance is not an unchanged household balance. They also avoid confusing a peg target with a guaranteed cash-out value. The example is educational and does not recommend a currency position or predict rates.
Official sources
An explanation of financial mechanics based on official sources. Hypothetical calculations are not actual trading results or forecasts.
