Guides
Concepts explained the way we wish they had been explained to us: the actual arithmetic, worked examples with real numbers, and the mistakes each idea invites. Every guide links to a calculator so you can run your own case.
Options
How options work, what moves their prices, and how the common strategies actually behave.
What a contract actually gives you, how premium and strikes work, and the four basic positions.
Delta, gamma, theta, vega, and rho in plain language, with what each one costs you.
Why the same strike costs more before earnings, and what IV crush does to a position.
Selling calls against stock you own: the income, the capped upside, and when it backfires.
Getting paid to wait for a lower entry price, and the risk that sentence hides.
Debit and credit spreads: defined risk, defined reward, and the trade-off you accept.
Selling a range: how the four legs fit together and why the math favors small frequent wins.
What happens at expiration, early assignment risk, and dividend edge cases.
Betting on movement instead of direction, and what it costs to be wrong.
Investing Basics
The handful of ideas that decide most long-term outcomes, explained with the arithmetic behind them.
Why the last decade of an investment produces more than the first three combined.
What buying on a schedule really does for your average price, and where the evidence lands.
Standard deviation, drawdowns, and why volatility is not the same as risk.
The one free lunch in investing, and how correlation decides its size.
Fundamental Analysis
How to read what a company reports to the SEC, and which numbers actually tell you something.
What price-to-earnings measures, what it hides, and why a low P/E is often a warning.
The number that is harder to manipulate than earnings, and how to compute it from filings.
From revenue down to earnings per share, line by line, using a real filing as the example.
Why share count matters as much as profit, and how to track it yourself.
Discounting future cash flows to a value today, and the assumptions that dominate it.
Personal Finance
Debt, savings, and retirement decisions where the arithmetic is clear even when the choice is hard.
Two payoff orders, one mathematically optimal and one that people actually finish.
Sizing cash reserves against your actual expenses and income stability.
Which account to fill first, and what the tax treatment really changes.
Where the number came from, what it assumed, and how it has held up.