Michael Mauboussin ✓

@mjmauboussin · joined 11 Jul 2012

Decisions, books, investing, mental models, complex adaptive systems, skill, luck. Adjunct Prof @Columbia_Biz and Chairman Emeritus of the Board @sfiscience

160 175Followers

379Following

5 253Posts total

370KViews on collected posts

Latest posts

Michael Mauboussin ✓@mjmauboussin2 Sep

We recently released a new report, "Public to Private Equity in the United States: A Long-Term Look," which is an update to a report we published in 2020. A lot has changed since we last wrote about this topic, including the end of the period of “easy money,” a worsening 84.3K views · 634 likes · 75 reposts · 22 replies Open on X →

Michael Mauboussin ✓@mjmauboussin29 Aug

@mjmauboussin I love that interactive snowball 409 views · 1 likes · 0 reposts · 1 replies Open on X →

Michael Mauboussin ✓@mjmauboussin29 Aug

@mjmauboussin Point number 9 is about the Kelly Criterion!!!! 432 views · 1 likes · 0 reposts · 1 replies Open on X →

Michael Mauboussin ✓@mjmauboussin29 Aug

@mjmauboussin thank you for all of the knowledge you have shared. i ordered 3 1.9K views · 4 likes · 0 reposts · 1 replies Open on X →

Michael Mauboussin ✓@mjmauboussin29 Aug

My forthcoming book, The Investing Mind, is an extended version of this report. Check it out and don't forget to roll a snowball while you're visiting the site! https://t.co/msnGdLrUjw 127.9K views · 905 likes · 112 reposts · 12 replies Open on X →

Michael Mauboussin ✓@mjmauboussin12 Aug

We recently (re)launched a number of websites. I will point out some features hat may be fun and useful. Thanks to @pjmauboussin for leading this effort! 54K views · 416 likes · 47 reposts · 14 replies Open on X →

Michael Mauboussin ✓@mjmauboussin5 Aug

We have a new report out today. We review the wisdom of crowds in the context of prediction markets, sports betting markets, parimutuel betting markets, and the stock market. The core idea draws on work by @jamesSurowiecki. 45.6K views · 338 likes · 43 reposts · 8 replies Open on X →

Michael Mauboussin ✓@mjmauboussin6 Jul

Jim was a wonderful colleague and friend. Super smart, always opinionated, open to ideas, and never took himself too seriously. He provided me with invaluable guidance. We lost a great one. Requiescat in pace. 24.3K views · 40 likes · 1 reposts · 2 replies Open on X →

Michael Mauboussin ✓@mjmauboussin6 Jul

Jim Rutt, SFI Trustee Emeritus and Distinguished Fellow, passed away on May 27, 2026, at age 72. Rutt's earliest involvement with SFI was as a researcher in residence in the early 2000s, exploring complex adaptive systems, agent-based models, and market economies. He joined the

31.2K views · 125 likes · 9 reposts · 21 replies Open on X →

Against accounts of the same size

9 posts from the last 90 days, next to the 100K–1M follower range. shown widely, but few of those viewers react.

Median views31 196this account5 971median for 100K–1M

Reach, %19.48%this account1.57%median for 100K–1M

Engagement, %0.51%this account0.99%median for 100K–1M

Metric	This account	Median for 100K–1M	Ratio
Median views per post	31 196	5 971	5.22×
Reach (views ÷ followers)	19.48%	1.57%	12.4×
Engagement rate	0.51%	0.99%	0.52×

Others in this range → Compare with another account → How these benchmarks are built →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

31.2K6 Jul

24.3K

45.6K5 Aug

54K12 Aug

127.9K29 Aug

1.9K

432

409

84.3K2 Sep

Last 9 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.51%6 Jul

0.18%

0.86%5 Aug

0.89%12 Aug

0.81%29 Aug

0.27%

0.46%

0.49%

0.89%2 Sep

Reactions — likes, reposts, replies and quotes — divided by views. Median for 100K–1M accounts is 0.99%.

What the audience does

Likes45.5%2 464 in total

Reposts5.3%287 in total

Replies1.5%82 in total

Quotes0.7%39 in total

Bookmarks47.0%2 549 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Latest posts

Against accounts of the same size

Growth & engagement

Views per post

Engagement rate per post

What the audience does

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