Dollar-backed stablecoins contribute to local currency depreciation by acting as a bridge for capital flight and arbitrage that favors the U.S. dollar over domestic fiat. According to a recent study by the Bank of Korea, there is a distinct correlation between increased buying pressure in stablecoin-paired currencies on global exchanges and the weakening of local currencies. This occurs because market makers must constantly rebalance their inventories across different trading pairs, effectively transmitting volatility from the crypto market into traditional foreign exchange markets.
The mechanics of this depreciation are tied to how market makers operate on platforms like Binance. When demand for dollar-backed stablecoins rises, market makers engage in arbitrage to maintain price parity across various fiat and crypto pools. This process often involves selling local currency to acquire the dollars or dollar-equivalent assets needed to facilitate trades, which increases the supply of the local currency on the open market and drives its value down relative to the greenback.
From a regulatory and geopolitical perspective, this finding underscores the challenges central banks face in maintaining monetary sovereignty in a digitized economy. While stablecoins offer liquidity and a gateway to decentralized finance, they also serve as a vehicle for 'dollarization,' where the U.S. dollar's influence is amplified at the expense of local monetary stability. For South Korea, which has a highly active retail crypto market, these flows represent a systemic risk that could complicate the Bank of Korea’s efforts to manage inflation and exchange rate volatility.
For investors and US-based platforms, this study highlights a growing tension between global crypto liquidity and national financial stability. Readers should watch for potential regulatory responses from central banks in emerging and mid-tier economies, such as stricter capital controls or new reporting requirements for stablecoin issuers and exchanges. If other central banks adopt the Bank of Korea's view, we may see a coordinated push to limit the impact of dollar-pegged digital assets on domestic forex markets.