Trying to Reason with Hurricane Season: The Aftermath of "Harma"

Key Points

  • Harvey will sit on top of the costliest hurricanes, and now has Irma in its coattails.
  • Hurricanes' impact on economy tends to be felt most acutely in unemployment claims.
  • "Harma" will unlikely dent the Fed's plans to continue monetary policy normalization.

Our hearts go out to everyone affected by Harvey and now Irma. I did little over the weekend except sit glued to the TV watching Hurricane Irma coverage. That's because I have a home in Naples, FL, on one of the southern intercoastal waterways. As of the writing of this, I have no idea how our home fared. My fingers are crossed (which could lead to typos).

Of course, before Irma unleashed her wrath, Houston got battered by Harvey; and last week the questions started coming in about Harvey’s economic and/or market impact.

Needless to say, the U.S. economy is massive and diverse, making it a tricky task to "unpack" a prior natural disaster's impact for the purpose of forecasting the impact from Harvey/Irma (perhaps we should collectively call them "Harma").

Limited stock market impact likely

As you can see in the table below, more often than not, the market did not suffer sustained losses following the six costliest hurricanes in U.S. history. The one exception was in the aftermath of Hurricane Ike in 2008. Clearly though, there was another powerful storm happening at the time—the global financial crisis—which easily gets the blame for the market’s carnage.

Price change table after hurricanes

Source: Ned Davis Research, Inc. (Further distribution prohibited without prior permission. Copyright 2017© Ned Davis Research, Inc. All rights reserved.)

Sponsored Content

Upcoming Virtual Events View All

July 20, 2026 at 12:30 PM EDT
The Outsized Impact of Microreactor Progress on the Nuclear Industry
July 20, 2026 at 01:30 PM EDT
Uncapped Nasdaq 100 (NDX) upside potential with a targeted limit on losses
July 21, 2026 at 12:30 PM EDT
T. Rowe Price Capital Appreciation income and dynamic allocation strategies
July 23, 2026 at 11:00 AM EDT - 1.0 CE credit
Rethinking Active and Passive Investing with Data-Enhanced ETFs
July 27, 2026 at 12:30 PM EDT
Powering the Future: The Investment Case for Electrification Infrastructure
July 28, 2026 at 11:30 AM EDT - 1.0 CE credit
Navigating What’s Next: Market Outlook and Portfolio Positioning for the Rest of the Year
July 29, 2026 at 12:30 PM EDT
Core portfolio strength may matter more than ever
July 30, 2026 at 02:00 PM EDT - 1.0 CE credit
Inside the Fastest-Growing Corner of the Income ETF Market
July 31, 2026 at 02:00 AM EDT - 1.0 CE credit
Hard Assets, Low Obsolescence: A Framework for Investing in the Age of AI
August 04, 2026 at 02:00 PM EDT - 1.0 CE credit
The Evolution of Income Investing: What Advisors Need to Know
August 10, 2026 at 12:30 PM EDT
From Insight to Alpha: Seek Client Results with Collective Conviction
August 11, 2026 at 04:00 PM EDT - 1.0 CE credit
Automating America: The New Wave of Robotics Demand
August 17, 2026 at 02:00 PM EDT - 1.0 CE credit
Income vs Valuation: Why Preferreds Matter In Today’s Environment
August 26, 2026 at 02:00 PM EDT - 1.0 CE credit
The secular case for emerging markets growth
August 31, 2026 at 12:30 PM EDT
The importance of hedging foreign currency exposure in your equity portfolio
November 12, 2026 at 11:00 AM EST - 1.0 CE credit
2027 Market Outlook Symposium