Learn the why. Not just the what.
Investing fundamentals, market logic, and the discipline behind good decisions.
Confirmation Bias in a Portfolio
You read the analysis that supports your holdings and dismiss the analysis that questions them. This is not a moral failing; it is a documented pattern, and it is the most portfolio-corrupting bias most investors carry.
Momentum Investing: Why Strength Tends to Persist
The single most robust anomaly in the academic finance literature is that recent winners keep winning, on average, over horizons of a few months to a year. Understanding why matters more than the pattern itself.
How ETF Creation and Redemption Actually Works
The reason ETFs trade close to their net asset value is a specific arbitrage mechanism — creation and redemption — that runs in the background every day.
Moving Averages: Frames, Not Prophecies
Moving averages describe time-frames visually; they do not predict where price is going. Understanding what they actually are is the first step to reading them correctly.
The Great Depression: Deflation and the Debt Spiral
The 1929–1932 collapse is the reference episode for every modern central bank. Understanding what actually broke — and what didn't — is the key to reading policy responses today.
Loss Aversion: Why Losses Weigh Twice
Kahneman and Tversky's central finding — that a loss is felt roughly twice as strongly as an equivalent gain — shapes almost every consequential decision an investor makes.
Day Trading vs Swing Trading vs Position Trading
The same market accommodates three very different time-frames. Each requires a different skill, a different psychology, and produces a different pattern of returns.
Why Liquidity Moves Before Price
Every price is a settlement between buyers and sellers, but the ability to trade at all — liquidity — moves ahead of price and shapes what happens when the tape wobbles.
Reading RSI Without Over-Fitting It
The 30/70 lines aren't a rulebook. Understanding the distribution behind the number is the first step to using RSI without letting it use you.
Quality Investing: Why Durable Businesses Compound
Ask what makes a business good, and whether goodness can be trusted to last, and you have the entire quality investing thesis in one deceptively simple question.
Momentum Investing: Riding Strength Without Chasing Noise
Momentum rests on an uncomfortable observation: assets that have performed well recently have often kept performing well, for reasons nobody can fully explain.
Index Investing: The Case for Owning Everything
Index investing starts with an admission most investors find hard to make: picking the winners ahead of time is far harder than just owning all of them.
Factor Investing: The Building Blocks Behind the Styles
Strip away the labels of value, growth, and momentum, and what's left is a colder, more measurable way of asking the same questions.
Dollar-Cost Averaging: Turning Time Into an Edge
Investing a fixed sum at regular intervals sounds almost too plain to count as a strategy. Its power lies not in what it achieves but in what it prevents.
Core-Satellite: Structuring a Portfolio Around Conviction
Core-satellite lets you hold two contradictory impulses at once: the discipline to own the market broadly and cheaply, and the itch to bet on what you actually believe.
Contrarian Investing: The Discipline of Standing Apart
The contrarian doesn't disagree with the crowd for the pleasure of disagreeing. They disagree because the crowd, at moments of extremity, has demonstrably been wrong before.
Buy-and-Hold: The Underrated Power of Doing Less
Buy-and-hold sounds trivial until you try it: the whole method rests on doing the one thing investors are worst at, which is nothing.
Why Markets Are Hard to Beat: The Competition You Cannot See
When you buy because you think something is cheap, someone else is selling because they think it is dear. The uncomfortable question is what that someone knows that you do not.
Why a Company Can Report Excellent Results and Fall
A company posts record profits and its stock drops. Nothing has gone wrong. The market wasn't reacting to the profits, it was reacting to the gap between the profits and what everyone…
Who Is on the Other Side of Your Trade
Every purchase needs a seller. Before congratulating yourself on an insight, it's worth asking who took the other side, and why.
What a Share Price Actually Represents
A price isn't a measurement of what something is worth. It's a record of what one buyer and one seller managed to agree on, in the last moment they agreed on anything.
Volatility Is Not Risk: A Distinction That Changes Everything
Volatility measures how much a price moves. Whether that movement amounts to risk depends on something volatility itself can't tell you: how long you actually plan to hold.
Timeframes and Self-Similarity: Why the Same Patterns Appear at Every Scale
A price chart of a single day and one of a decade can look strikingly alike. That resemblance isn't coincidence, and it has real consequences for how markets should be read.
The Spread: The Cost You Pay Without Being Told
Commissions are visible, and these days often zero. The spread is invisible and never zero, and across enough trades, it's the bigger cost of the two.