AI bubble risk, SpaceX IPO mechanics, and Greenspan's legacy (with Tom Keene, Paul Sweeney)

Introduces the discussion on Greenspan's legacy and the 2004 SEC rule that contributed to the financial crisis.

Tom Keene

Gary Gensler

There was a broad miss by policymakers across the spectrum that led to the financial crisis. Greenspan was a dedicated economist and public servant, but none of us get everything right—too much leverage built up in housing and financial markets.

We exported that crisis around the globe.

Asks if we need more central bankers like Greenspan—market economists steeped in data.

Tom Keene

Gary Gensler

Greenspan was steeped in financial markets—he traded futures as a young man. He had a great sense of markets but too much trust in them to self-correct during imbalances. He navigated the internet enthusiasm but missed the housing market imbalances.

He understood backwardation in energy markets, which was remarkable.

Asks if mega IPOs like SpaceX signal where we are in the market cycle.

Paul Sweeney

Gary Gensler

Equity markets are funding a massive AI infrastructure build—$750B this year, 2.5% of GDP. This is a tell. There are valuation questions at 100-140x revenues without earnings. When VCs and sovereign wealth funds start selling, there could be downward pressure on the whole market.

Google raising $85B is also a tell.

Asks about MIT's understanding of AI and how to think about winners and losers.

Paul Sweeney

Gary Gensler

AI is the most transformative technology of our times, but we've seen this before—over-enthusiastic financial market support followed by a reckoning. The question is whether it's a calamitous reckoning (1870s railroads), a modest one (1920s electrification), or like the internet. AI needs both revenue generation and productivity gains to justify current valuations.

I think of it like a parlay bet: you need AI hyperscalers to build revenues (they don't have them yet) and productivity gains to offset disruption.

Asks about retail losses in Bitcoin.

Tom Keene

Gary Gensler

Markets trade on sentiment and fundamentals. Bitcoin purchasers need to ask what the real use cases are. Crypto is like meme stocks—you have to be careful you're not trading just on sentiment.

Asks if the SpaceX IPO process is manipulated—tranching out stock over months to keep fervor up.

Tom Keene

Gary Gensler

NASDAQ made an accommodation: once 30% of SpaceX stock is outstanding (possibly mid-August), the entire free float is counted into the NASDAQ 100, triggering buying. But the other side is the 'great rebalancing'—VCs and sovereign wealth funds will want to take risk off the page, creating significant selling pressure as lockups expire.

They'll want to take a third, a half, maybe three-quarters of the risk off the page.

Asks about the regulatory framework for AI going forward.

Paul Sweeney

Gary Gensler

Society adapts to great technology by promoting public goods—'responsible AI.' When algorithms make decisions on healthcare, jobs, or credit, accuracy is critical. The current administration favors deregulation to compete with China, but society is starting to ask about kids, addiction, and job displacement.

The politics of this will be very interesting over the next several years.

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