The central bank directly uses stablecoins to support the exchange rate, Iran's $500 million USDT transaction reveals new uses for cryptocurrencies

The Central Bank of Iran obtained over $500 million worth of USDT last year and used it directly to support the local currency exchange rate. This is the latest discovery by blockchain intelligence firm Elliptic based on leaked documents, and it is the first clear evidence that a sovereign central bank has used stablecoins in market interventions. This case challenges traditional perceptions of cryptocurrency applications and also reflects how countries are innovating financial tools under geopolitical pressures.

Key Event: $500 Million Stablecoin Transaction by the Central Bank

According to recent reports, the Central Bank of Iran completed this transaction through an entity called Modex last year. Elliptic co-founder and chief scientist Tom Robinson stated that the leaked documents detailed these purchases. Key details include:

• Transaction size: Over $500 million USDT
• Method: Conducted via the Modex entity
• Time: Last year (2025)
• Current status: All confirmed USDT has now left wallets associated with Iran
• Purpose: To support the price of the Iranian Rial

Why would the central bank choose stablecoins?

Several important factors underpin this decision. First, Iran faces long-term exchange rate pressures and international sanctions, with ongoing devaluation of its currency. Second, traditional foreign exchange reserves face liquidity constraints, and stablecoins offer a relatively covert and rapid way to move funds. Third, USDT, as the most liquid stablecoin in the market, has high usability in on-chain transactions.

From this perspective, Iran’s central bank’s approach reflects the practical need for alternative financial tools as the global financial system becomes more restricted. Stablecoins here are not used for speculation but as a supplement to traditional foreign reserves.

Personal Perspective: What does this mean?

This case offers several important insights. First, the application scope of stablecoins is expanding from grassroots trading tools to national-level financial decision-making. Second, geopolitical factors are driving the real-world use of cryptocurrencies beyond mere price speculation. Third, the limitations of traditional financial systems are being challenged, and countries are beginning to seek on-chain financial alternatives.

Future areas of focus

Looking ahead, it will be interesting to see whether other countries facing similar sanctions or exchange rate pressures will follow suit. The use of stablecoins as a central bank tool could prompt regulators to redefine stablecoins. At the same time, this may accelerate the development of national digital currencies (CBDCs).

Summary

Iran’s $500 million USDT transaction marks a turning point. It demonstrates that stablecoins have evolved from marginal speculative tools into references for national financial decision-making. Although this occurred within a specific geopolitical context, it opens a door for us to see the potential new roles cryptocurrencies could play in national financial systems. This case also reminds us that understanding the future of cryptocurrencies requires a simultaneous understanding of geopolitical and financial system changes.