Skip to main content
SPX6,931.50+0.84%
DJI49,482.00+0.62%
COMP30,834.00+1.46%
RUT2,645.80+0.47%
Investment Education

The Intelligent
Investor's Edge

Decades of portfolio management distilled into essays, research tools, and structured learning — free, forever.

S&P 5006,045.33
+0.06%
30D



Guided Analysis

Start a Conversation with MK Brain

Enter a ticker symbol and explore valuation, business model, and risk with our AI advisor. After the conversation, we'll recommend essays and videos to deepen your understanding.

What company are you researching?

Enter a ticker symbol to start a guided conversation about the company.

Marlowe Keynes
About

Built by an Investor,
Not a Publisher

This started as a personal notebook. Notes on position sizing after a bad quarter. Margin of safety calculations scribbled during earnings season. Frameworks for thinking about risk that actually survived contact with real markets.

It grew into something worth sharing. Not advice — a way of thinking. The kind of mental models that separate thoughtful allocators from everyone chasing the next hot take.

No paywall. No premium tier. If it helps you think more clearly about risk and return, it's done its job.

50+

Essays & Research

12

Learning Paths

25+

Research Tools

Wisdom

From Those Who Came Before

"The stock market is a device for transferring money from the impatient to the patient."
WB

Warren Buffett

Berkshire Hathaway

"It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent."
CM

Charlie Munger

Berkshire Hathaway

"The intelligent investor is a realist who sells to optimists and buys from pessimists."
BG

Benjamin Graham

The Intelligent Investor

"The most important thing is to be aware of the role of cycles and to position yourself accordingly."
HM

Howard Marks

Oaktree Capital

"The margin of safety is always dependent on the price paid. It will be large at one price, small at some higher price, nonexistent at some still higher price."
SK

Seth Klarman

Baupost Group

"Risk means more things can happen than will happen."
ED

Elroy Dimson

London Business School

"In investing, what is comfortable is rarely profitable."
RA

Robert Arnott

Research Affiliates

"The four most dangerous words in investing are: 'This time it's different.'"
SJT

Sir John Templeton

Templeton Funds

"The ocean doesn't care about your swimming lessons."
DS

David Steinberg

Marlowe Research

"Wide diversification is only required when investors do not understand what they are doing."
WB

Warren Buffett

Berkshire Hathaway

"The stock market is a device for transferring money from the impatient to the patient."
WB

Warren Buffett

Berkshire Hathaway

"It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent."
CM

Charlie Munger

Berkshire Hathaway

"The intelligent investor is a realist who sells to optimists and buys from pessimists."
BG

Benjamin Graham

The Intelligent Investor

"The most important thing is to be aware of the role of cycles and to position yourself accordingly."
HM

Howard Marks

Oaktree Capital

"The margin of safety is always dependent on the price paid. It will be large at one price, small at some higher price, nonexistent at some still higher price."
SK

Seth Klarman

Baupost Group

"Risk means more things can happen than will happen."
ED

Elroy Dimson

London Business School

"In investing, what is comfortable is rarely profitable."
RA

Robert Arnott

Research Affiliates

"The four most dangerous words in investing are: 'This time it's different.'"
SJT

Sir John Templeton

Templeton Funds

"The ocean doesn't care about your swimming lessons."
DS

David Steinberg

Marlowe Research

"Wide diversification is only required when investors do not understand what they are doing."
WB

Warren Buffett

Berkshire Hathaway



Curriculum

What We Cover

Six areas that matter most when real money is on the line

01

Risk Management

Understanding and quantifying risk, position sizing, and protecting capital during market downturns.

02

Fundamental Analysis

Evaluating businesses, reading financial statements, and identifying quality investments.

03

Portfolio Construction

Building diversified portfolios, asset allocation strategies, and rebalancing principles.

04

Behavioral Finance

Recognizing cognitive biases, emotional discipline, and making rational decisions under uncertainty.

05

Market Dynamics

Understanding market cycles, liquidity, and the forces that drive price movements.

06

Long-Term Thinking

Compound growth, patience, and the mindset required for successful long-term investing.


Get Started

Start Reading Today

No paywall. No sign-up required. Just decades of investment thinking, openly shared.

Marlowe Keynes
Marlowe KeynesLearn

Think clearly. Invest deliberately.

© 2026 Marlowe Keynes. All rights reserved.

← All Tools