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THIS WEEK'S RMN
MODELS · Senate Committee Passes Weather Forecasting Overhaul That Would Boost Downstream Risk Modeling
A sweeping federal weather forecasting bill would expand atmospheric river modeling, codify commercial data partnerships, and push NOAA toward probabilistic forecasting across flood, fire, and drought perils. — Read →
MARKETS · Pershing Files for $10B IPO as Vantage Deal Puts Insurance at Center of Ackman's Strategy
Pershing Square's IPO filing confirms the $2.1 billion Vantage acquisition and reveals insurance companies as anchor investors — while flagging the deal as a distraction risk to the fund itself. — Read →
MODELS · Verisk CFO Says Data Moat Is the AI Story, Not the Threat
CFO Elizabeth Mann also outlined a major cat modeling product launch midyear. — Read →
MARKETS · Greenlight Re Reports Record Underwriting Year, Minimal Private Credit and War Exposure
Greenlight Re's strategy delivered record underwriting income and a near-10% investment return year-to-date, even as war exclusion gaps and a softening reinsurance market test the company's 2026 position.. — Read →
MODELS · OpenAI Is Hiring a Threat Modeler to "Own" Its Catastrophic Risk Framework
A new job listing from OpenAI's Preparedness team signals the company is formalizing its modeling approach to frontier AI risk. — Read →
When Mark Zuckerberg paid $170 million for a mansion on Indian Creek Island last week (the most expensive residential transaction in Miami-Dade County history) he joined a long list of Wall Street firms, hedge funds, and private equity executives who have made South Florida their home. They came for the tax arbitrage: no state income tax, lower operating costs, favorable regulatory climate.
What Moody's Analytics economist Chris Lafakis wants them to know is what they may not have fully priced into that decision.
"I'm not sure that they do fully understand the risk," Lafakis said in this weel’s episode of the Risky Science Podcast. "Before we did this analysis, we wouldn't have had an idea — ninety percent wind versus flooding, 68,000 in population losses by 2030. We didn't know any of those numbers prior to doing the analysis. Part of the study is to quantify this and allow better-informed risk management decisions."
Lafakis, a director and macroeconomist at Moody's Analytics specializing in energy and climate economics, is the author of a stress-test scenario modeling a Category 5 hurricane making direct landfall on Miami-Dade. The study was released last year and produced in collaboration with Moody's insurance division, formerly RMS. It combined natural catastrophe modeling at the asset level with a macroeconomic model to produce a county-by-county forecast of the economic fallout. It is, by Lafakis's account, the first analysis to attempt that pairing at this level of granularity.
Worse Than the Financial Crisis
The headline finding: a Cat 5 Miami scenario is worse for the local economy than a severe recession. worse, in both moderate and severe policy response scenarios, than the 2008 global financial crisis as experienced by Miami.
Moody's modeled approximately $232 billion in total economic losses, with $212 billion concentrated in the Tri-County area. Only 54% of those losses are insured. Under the study's moderate scenario — which assumes federal supplemental legislation covering roughly half of losses, consistent with the post-Katrina response — homeowners insurance premiums in the region rise approximately 53% over three years. Under the severe scenario, with no federal backstop and state mechanisms strained, premiums rise close to 300%. Population outflows reach 24,000 by 2030 in the moderate case; 68,000 in the severe.
The Arbitrage Calculus, Revisited
The migration driving Miami's luxury market has been well documented.
According to Redfin, Miami-Dade County saw 67,418 more people move out than in last year — the largest domestic net outflow of any high-flood-risk county in the country, and an acceleration from 50,637 the prior year. Yet the county's overall population still grew 2.3%, to 2.8 million, driven by international immigration. And at the top of the market, the flow of capital has not slowed: Zuckerberg's Indian Creek purchase surpassed the previous Miami-Dade record.
Lafakis acknowledged the tax and regulatory calculus that draws capital to the region, but noted the Moody's analysis captures what happens to that calculus when insurance costs are factored in post-event. "If it becomes suddenly a lot more expensive to operate or maintain a home because it costs a lot more to get insurance — or maybe you have trouble getting insurance — then your demand for those properties is going to decline," he said. "That's pure economics. What is this property worth, and how much does it cost for me to operate it?"
The full interview with Chris Lafakis is available to Risk Market News subscribers.
