Bank of Korea Research Links Tether (USDT) Demand to Local Currency Depreciation

BOK Study Traces Stablecoin Demand Into FX Markets

A research paper published by the Bank of Korea (BOK) on September 3 argues that dollar stablecoin demand no longer stays confined to crypto venues — it can transmit directly into conventional foreign-exchange markets. The study, titled “Stablecoin–FX Linkages: Evidence from Fiat–Stablecoin Pair Listings on a Global Exchange,” uses Binance’s additions of local-currency versus dollar-stablecoin trading pairs as its research events; the full text sits on the central bank’s official research portal. Its central finding is blunt: once such a pair goes live, price linkage between the stablecoin market and the spot FX market rises sharply. The transmission loop runs through market-maker hedging. When investors buy Tether (USDT) or USD Coin (USDC) with local currency, the market makers supplying those tokens accumulate the local currency and sell it in the traditional FX market to reload dollars — so a wave of stablecoin buying ends up as net dollar demand. Before a fiat pair exists, a stablecoin premium shows up mainly inside crypto prices and barely moves the currency rate; after listing, the BOK observes pronounced local-currency depreciation when stablecoins trade at a premium, plus a statistically significant association between net buyer-initiated order flow and currency weakness. Korea itself is a partial exception: Binance operates no won-based fiat pair, so domestic stablecoin demand surfaces as the familiar “kimchi premium” rather than direct pressure on the won — for now. The scale behind the finding matters. Market data as of September 7 puts total stablecoin capitalization near $291 billion, with USDT at roughly $183.4 billion and USDC at about $74.5 billion; the two together approach $258 billion, close to ninety percent of the category. For economies with smaller currencies and open capital accounts, this is effectively an on-chain dollar system — distinct in kind from commodity-backed tokens such as Tether Gold (XAUT), because every dollar-stablecoin purchase implies a currency conversion somewhere.

KODEAC Pushes Cross-Border Order Brokerage

While the BOK worries about exchange-rate spillovers, a parallel debate in Seoul concerns investor protection on those same offshore venues. Park Chang-bum, chairman of the Korea Digital Asset Evaluation and Certification Institute (KODEAC), argued in a recent interview that Korea should stop trying to wall off offshore trading and instead formalize a safe channel through domestic exchanges. His proposal, modeled on how Koreans buy overseas stocks, would let customers place orders with locally licensed platforms, which route them to multiple offshore exchanges that have passed eligibility screening on licensing, client-asset segregation, accounting audits and incident-response obligations. Custody would be segregated with domestic operators or licensed trustees, while the local platform handles know-your-customer checks, anti-money-laundering monitoring, trade-record keeping and complaint intake. Park’s case rests on a protection gap: an offshore account can be opened and funded in minutes, but when withdrawals are frozen there is often no Korean entity accountable for the loss. He also cautioned against any design that hands dominant domestic venues both gatekeeping and refereeing powers — eligibility screening and market surveillance should sit with an independent body, he said, while domestic platforms carry best-execution and conflict-management duties. KODEAC plans to collect real damage cases from the second half of this year — long suspensions from KYC re-review, withdrawal blocks, forced-liquidation disputes and system outages — to feed institutional reform, and wants “cross-border order brokerage and custody” written into the Digital Asset Basic Act as a formal business category. The demand side is already visible: Korean users go offshore for derivatives, stablecoin markets and early liquidity in tokens from projects like Virtuals Protocol, and KODEAC is separately building “SATI,” a project combining AI, K-content and real-world assets around user-held data credentials. Readers tracking the market in real time can follow live spot and futures prices on Binance.

Taiwan Law Shows Where This Is Heading

Our reading is that these two threads point the same way: stablecoin policy is becoming FX policy. Taiwan has already legislated the link — its Virtual Asset Service Law, published in the presidential gazette on July 22, 2026, defines stablecoins as fiat-pegged virtual assets, requires Financial Supervisory Commission approval with mandatory central-bank consultation, and under Article 36 obliges issuers to hold full reserves at domestic financial institutions, with any foreign-exchange component governed by central bank rules. Korea’s new empirical evidence gives that legal architecture its justification. As stablecoin spending spreads through rails like Tangem Pay and compliance-heavy venues such as Coinbase set the global baseline, the jurisdictions that pair digital-asset innovation with explicit FX safeguards are the ones most likely to define the standard others follow.