16. Central Banks & Commercial Banking, Part 2

What this lecture covers

This lecture continues the central banking module by connecting historical private banknotes to today's stable value tokens, then surveys four countries' central bank digital currency (CBDC) experiments. Gensler argues that the current wave of crypto stable value tokens resembles the free banking era, when individual commercial banks issued their own paper notes before a national currency authority took over.

By the end, you should be able to explain why central banks are wary of a hypothetical crisis in a crypto-dominated economy, describe how a fiat-collateralized stable value token is ultimately still dependent on the traditional banking system, and compare the different motivations behind CBDC initiatives in Ecuador, Senegal, the Philippines and Sweden.

Key ideas

• Central banks and hypothetical cryptocurrency dominance: if a country's economy became dependent on a cryptocurrency as its medium of exchange, the central bank would lose most of its ability to act as lender of last resort or run open market operations, because there is no central authority to expand supply on demand.
• The kimchi premium: Bitcoin traded at a higher price in Korea than elsewhere for a period because regulatory constraints on moving Bitcoin across borders prevented arbitrage, illustrating that digital assets can still show locational price differences when regulation blocks free movement.
• 2008 crisis powers versus Dodd-Frank limits: the Federal Reserve and Treasury used broad, sometimes untested legal authority to backstop the financial system in 2008; Dodd-Frank later tightened those powers to reduce moral hazard, meaning future crisis responses may be more constrained.
• Private banknotes as precedent: before central banks consolidated currency issuance, commercial banks issued their own paper notes (the US "free banking era" under Andrew Jackson); Hong Kong and Scotland still have limited legacy note-issuing by private banks today.
• Stable value token collateral problem: a fiat-collateralized stable value token (like Tether) must ultimately hold its backing as either physical cash, commercial bank deposits, or central bank reserves — the same categories it's often trying to bypass, and at large scale it recreates the same dependency on the banking system.
• Why crypto-to-crypto trading persists: some traders prefer trading crypto for crypto rather than crypto for fiat to avoid anti-money-laundering scrutiny or triggering taxable events, though the lecture notes a 2017 US tax law clarified that crypto-to-crypto trades are still taxable.
• Four CBDC case studies: Ecuador's central-bank-issued digital currency largely failed due to lack of trust and overly optimistic adoption targets; Senegal and the Philippines use private, non-blockchain "digital fiat currency" software marketed with blockchain branding; Sweden is seriously exploring an interest-bearing CBDC because physical krona now makes up under 2% of its GDP and retailers increasingly refuse it.

Walkthrough

Central banking review and the credit allocation question (3:02)

Gensler reviews central banks' core functions (managing fiat money supply and price, overseeing banking, serving as lender of last resort) and opens a hypothetical debate: if a cryptocurrency became a country's dominant currency, would the central bank still have a meaningful role, particularly around open market operations and price stability.

The 2008 crisis and constrained crisis powers (23:02)

Using his own experience during the financial crisis, Gensler explains how the Fed and Treasury used and stretched legal authority to rescue the financial system, contrasting Bear Stearns' rescue with Lehman Brothers' failure, and how Dodd-Frank later limited some of those emergency powers to address moral hazard concerns raised by the class.

Private banknotes and the free banking era (36:15)

The lecture traces the history of privately issued banknotes in the US before the Civil War, the creation of the Comptroller of the Currency to regulate them, and draws a parallel to today's crypto asset landscape. Hong Kong and Scotland/Northern Ireland are cited as places where commercial banks still issue notes under tight central authority oversight.

Stable value tokens and their design trade-offs (41:22)

Gensler surveys different stable value token designs (fiat-collateralized like Tether, crypto-collateralized, and non-collateralized/algorithmic), explaining that large-scale fiat-collateralized tokens ultimately depend on holding reserves as cash, bank deposits, or central bank reserves, the same infrastructure they often aim to bypass. The class also discusses why some tokens include the technical ability to freeze funds, which raises questions about how "decentralized" such tokens really are.

Central bank approaches and the money flower (53:41)

The lecture recaps the four central bank postures toward crypto (monitoring, restricting, payment system experimentation, and CBDC initiatives) and locates Bitcoin and fiat-backed stable value tokens on the "money flower" diagram, noting that stable tokens are technically private and not central-bank-issued, yet remain highly dependent on the central-bank-regulated banking system.

Four country case studies: Ecuador, Senegal, the Philippines, Sweden (1:04:01)

Students and Gensler review Ecuador's failed central-bank-issued digital currency, which suffered from a lack of public trust after a national default and wildly overestimated adoption targets; Senegal and the Philippines, which use an Irish software vendor's "digital fiat currency" issued by commercial banks under regulatory sandboxes, despite blockchain-flavored marketing that Gensler says isn't actually blockchain-based; and Sweden, where physical krona use has fallen so far that the central bank is seriously considering an interest-bearing digital krona to preserve a public means of payment.

Before you watch

• Watch Part 1 of this pair of lectures first, since this session assumes familiarity with the three forms of money and the central bank digital currency framing introduced there.
• Some background on the 2008 financial crisis and the Federal Reserve's emergency actions will help with the crisis-powers discussion.

Check your understanding

1. Why would a central bank have a much harder time running effective monetary policy if a cryptocurrency, rather than its own fiat currency, became the dominant medium of exchange in its economy?
2. What caused the "kimchi premium" for Bitcoin in Korea, and why does it illustrate a limit on typical digital-asset arbitrage?
3. What are the three possible forms of collateral behind a large fiat-collateralized stable value token, and why does Gensler argue this recreates dependency on the traditional banking system?
4. Why did Ecuador's central-bank-issued digital currency fail to gain adoption?
5. What specific trend in physical currency use is driving Sweden's central bank to seriously consider an interest-bearing digital krona?