Sunday, February 23, 2025

When Markets Misbehave

Markets misbehave, sometimes when we least expect it. How badly they misbehave depends on the soundness of the hull and the level of self-reinforcing hubris.

When Benoit Mandelbrot's book The (Mis)behavior of Markets was published in 2004, it was a revelation for many of us. I remember sitting in my car in a parking lot, unwilling to tear myself away from reading it.

Here's the super-short summary: from time to time markets crash for no visible reason. The internal dynamics of market structures are fractal, and one feature of this structure is that markets break down unpredictably. After the fact, we seek an external trigger--a Federal Reserve "policy error," inflation fears, etc.--but these post-mortem explanations gloss over the cause, which is the inherent instability of market structures.

Markets can trundle along for years appearing to be stable and controllable. Any spot of bother can be corrected with a reduction in interest rates or quantitative easing. Everything is known and controllable.

But this control is illusory. Out of the blue, markets stop behaving. They misbehave, and possibly quite badly.

Nature offers many examples. The seas are relatively calm, and suddenly an enormous rogue wave appears.

At that point, the condition of the ship matters. A sound craft will survive the rogue wave, the leaky, rotten hulk won't.

Human hubris also matters. If the passengers and crew of the hulk have been persuaded by each other's happy talk that the ship is rock-solid, then its breaking apart will come as a nasty shock.

In the current zeitgeist, the consensus is the mighty ship of the stock market is a superliner. No matter how big the rogue wave, the ship will handle it easily.

But what if the consensus is wrong, and we're all passengers on a rotting hulk gussied up with new paint? What if the consensus isn't based on the soundness of the hull, but on the self-reinforcing happy-talk around the dessert cart and bar?

The consensus is convinced the ship is unsinkable, and so the guaranteed path to profit is to "buy the dip" after the rogue wave has passed. This guarantee is not actually causal; it's recency bias, as "buy the dip" has worked like magic for 15 years.

Nobody's interested in leaving the first class casino to get in a lifeboat when guaranteed profits beckon. The question is: how sound is the hull? Who's actually checking, and who's just parroting happy-talk? Can we even tell the difference?

In a euphoric speculative bubble, the answer is "no." In a speculative bubble, "buy the dip" is all you need to know to win big, and continue winning big. So who cares about rogue waves and rotten hulls?

I often refer to this chart of the dot-com bubble because this happened not in some pre-technology era but in the technology-obsessed present. I attended Comdex in Las Vegas in the peak euphoria, and attendees were busy trading stocks online amidst the crowd. Every bubble is forever until it is no more.



Notice the numerous sharp spikes higher as the crowd "bought the dip." The initial crash was bought with all four feet, which was followed by a secondary crash to a new low, which was immediately bought, generating a euphoric spike that signaled "all clear, buy buy buy!" until it too rolled over. This was followed by one last manic "buy the dip" which resulted in a double-top. Once that petered out, a multi-year stair-step down began. The index eventually bottomed after losing about 80% of its peak valuation.

Markets misbehave, sometimes when we least expect it. How badly they misbehave depends on the soundness of the hull and the level of self-reinforcing hubris.




My recent books:

Disclosure: As an Amazon Associate I earn from qualifying purchases originated via links to Amazon products on this site.

The Mythology of Progress, Anti-Progress and a Mythology for the 21st Century print $18, (Kindle $8.95, Hardcover $24 (215 pages, 2024) Read the Introduction and first chapter for free (PDF)

Self-Reliance in the 21st Century print $18, (Kindle $8.95, audiobook $13.08 (96 pages, 2022) Read the first chapter for free (PDF)

The Asian Heroine Who Seduced Me (Novel) print $10.95, Kindle $6.95 Read an excerpt for free (PDF)

When You Can't Go On: Burnout, Reckoning and Renewal $18 print, $8.95 Kindle ebook; audiobook Read the first section for free (PDF)

Global Crisis, National Renewal: A (Revolutionary) Grand Strategy for the United States (Kindle $9.95, print $24, audiobook) Read Chapter One for free (PDF).

A Hacker's Teleology: Sharing the Wealth of Our Shrinking Planet (Kindle $8.95, print $20, audiobook $17.46) Read the first section for free (PDF).

Will You Be Richer or Poorer?: Profit, Power, and AI in a Traumatized World
(Kindle $5, print $10, audiobook) Read the first section for free (PDF).

The Adventures of the Consulting Philosopher: The Disappearance of Drake (Novel) $4.95 Kindle, $10.95 print); read the first chapters for free (PDF)

Money and Work Unchained $6.95 Kindle, $15 print)
Read the first section for free


Become a $3/month patron of my work via patreon.com.

Subscribe to my Substack for free





NOTE: Contributions/subscriptions are acknowledged in the order received. Your name and email remain confidential and will not be given to any other individual, company or agency.

Thank you, Reynold W. ($70), for your marvelously generous subscription to this site -- I am greatly honored by your support and readership.

 

Thank you, Bob F. ($70), for your superbly generous subscription to this site -- I am greatly honored by your support and readership.


Thank you, Farouk B. ($70), for your magnificently generous subscription to this site -- I am greatly honored by your support and readership.

 

Thank you, Ed W. ($7/month), for your splendidly generous subscription to this site -- I am greatly honored by your support and readership.

Terms of Service

All content on this blog is provided by Trewe LLC for informational purposes only. The owner of this blog makes no representations as to the accuracy or completeness of any information on this site or found by following any link on this site. The owner will not be liable for any errors or omissions in this information nor for the availability of this information. The owner will not be liable for any losses, injuries, or damages from the display or use of this information. These terms and conditions of use are subject to change at anytime and without notice.


Our Privacy Policy:


Correspondents' email is strictly confidential. This site does not collect digital data from visitors or distribute cookies. Advertisements served by a third-party advertising network (Investing Channel) may use cookies or collect information from visitors for the purpose of Interest-Based Advertising; if you wish to opt out of Interest-Based Advertising, please go to Opt out of interest-based advertising (The Network Advertising Initiative). If you have other privacy concerns relating to advertisements, please contact advertisers directly. Websites and blog links on the site's blog roll are posted at my discretion.


PRIVACY NOTICE FOR EEA INDIVIDUALS


This section covers disclosures on the General Data Protection Regulation (GDPR) for users residing within EEA only. GDPR replaces the existing Directive 95/46/ec, and aims at harmonizing data protection laws in the EU that are fit for purpose in the digital age. The primary objective of the GDPR is to give citizens back control of their personal data. Please follow the link below to access InvestingChannel’s General Data Protection Notice. https://stg.media.investingchannel.com/gdpr-notice/


Notice of Compliance with The California Consumer Protection Act
This site does not collect digital data from visitors or distribute cookies. Advertisements served by a third-party advertising network (Investing Channel) may use cookies or collect information from visitors for the purpose of Interest-Based Advertising. If you do not want any personal information that may be collected by third-party advertising to be sold, please follow the instructions on this page: Limit the Use of My Sensitive Personal Information.


Regarding Cookies:


This site does not collect digital data from visitors or distribute cookies. Advertisements served by third-party advertising networks such as Investing Channel may use cookies or collect information from visitors for the purpose of Interest-Based Advertising; if you wish to opt out of Interest-Based Advertising, please go to Opt out of interest-based advertising (The Network Advertising Initiative) If you have other privacy concerns relating to advertisements, please contact advertisers directly.


Our Commission Policy:

As an Amazon Associate I earn from qualifying purchases. I also earn a commission on purchases of precious metals via BullionVault. I receive no fees or compensation for any other non-advertising links or content posted on my site.

  © Blogger templates Newspaper III by Ourblogtemplates.com 2008

Back to TOP