Why Hasn't The Dollar Fallen?

Key Concepts

• International Currency: A currency used widely beyond its home borders for trade, finance, and as a reserve asset by central banks.
• Debasement: The practice of lowering the value of a currency (e.g., reducing precious metal content or excessive printing), often to fund government deficits.
• Gresham’s Law: The economic principle stating that "bad money drives out good," where individuals hoard superior currency and spend inferior currency.
• Network Externalities: The phenomenon where a currency becomes more valuable as more people use it, creating a "winner-take-all" effect.
• Exorbitant Privilege: The unique advantages enjoyed by the issuer of a global reserve currency, such as lower borrowing costs and the ability to export inflation.
• Fiscal Prudence: The practice of a government living within its means, essential for maintaining long-term currency trust.
• Tokenization: The process of representing real-world assets (like gold or bank deposits) on a blockchain.

1. The Arc of Global Currencies

Barry Eichengreen traces the history of dominant currencies, noting that they are not permanent.

• Spanish Pieces of Eight: Served as the first true global currency, circulating on every continent. Its dominance was driven by the massive silver deposits in Peru and Mexico and the lack of a colonial mint in the 13 colonies.
• Byzantine Solidus: Known as the "dollar of the Middle Ages," it maintained value for roughly 700 years due to the Byzantine Empire’s fiscal prudence and lack of debasement.
• The US Dollar: Currently the dominant reserve currency, but Eichengreen argues it is in a slow, "melting iceberg" phase of decline, losing roughly 0.5% of global market share annually over the last 25 years.

2. Preconditions for Global Currency Status

Eichengreen identifies four pillars required for a currency to achieve and maintain international dominance:

1. Economic/Commercial Prowess: High volume of trade with the rest of the world.
2. Financial Development: Deep, liquid capital markets that allow for easy borrowing and lending.
3. Political Stability: Rule of law, separation of powers, and checks and balances.
4. Security/Alliances: Military strength to protect borders and trade routes, and the ability to act as a reliable alliance partner.

3. The Mechanics of Decline

Currencies typically fall due to a combination of:

• Economic Deterioration: Losing competitiveness (e.g., the UK in the 20th century).
• Debasement: Financing military or political excesses by devaluing the currency.
• Loss of Trust: When foreign holders fear the issuer is no longer a reliable steward of their wealth.
• The "Slow then Sudden" Scenario: Eichengreen cites economist Rudy Dornbush, noting that currency crises often arrive slowly, then occur with violent, sudden intensity.

4. The Role of Gold and Crypto

• Gold: Historically serves as a "hard money" restraint on government excess. Central banks currently use it as a hedge against sanctions and a way to diversify away from dollar-denominated securities.
• Bitcoin/Crypto: Eichengreen views current "plain vanilla" cryptocurrencies as too volatile for daily payments. He suggests the future of finance lies in Central Bank Digital Currencies (CBDCs) and tokenized bank deposits rather than decentralized crypto assets, as these maintain the existing institutional framework while utilizing modern blockchain payment rails.

5. The "Exorbitant Privilege" and US Risks

The dollar’s status provides the US with "automatic insurance" during crises (safe-haven flows). However, the costs include:

• Headwinds for Exporters: A stronger dollar makes US goods more expensive abroad.
• Financialization: The US economy may be overly focused on financial engineering rather than manufacturing and infrastructure, partly because the dollar is a "product" the US can export.

6. Synthesis and Conclusion

Eichengreen concludes that while the dollar remains the "cleanest shirt in the laundry," its dominance is not guaranteed. The primary threat to the dollar is internal—specifically, the erosion of political checks and balances and fiscal irresponsibility. He advises investors to avoid "all-in" strategies, emphasizing that diversification is the only rational defense against the potential for future monetary disruption.

Notable Quote: "History doesn't repeat, but it rhymes." — Barry Eichengreen, regarding the parallels between the current US situation and past currency declines.