Sector Rotation: What It Is and How to Track It
Sector rotation is how smart money moves through the 11 S&P 500 sectors as the economy shifts. Learn which sectors lead in each cycle phase and how to track it.
investing basics
How Short Selling Works: Short Interest & Squeezes Explained
Short selling explained — from borrowing shares to short squeezes. A clear, data-backed guide with historical examples, regulatory rules, and key metrics every investor should know.
Bond Pricing, Yield, Duration & Convexity Explained
Learn how bond prices move with interest rates, what duration really measures, and why convexity matters — with worked examples and real data.
GAAP vs. Non-GAAP Earnings: What Adjusted EPS Really Means
AMD posted $0.84 GAAP EPS and $1.37 adjusted EPS in Q1 2026—a 63% gap. Here’s what each number measures, what adjustments create the difference, and how investors should read both.
Options Greeks Explained: Delta, Gamma, Theta, and Vega
Learn how delta, gamma, theta, vega, and rho measure an option’s price sensitivity — with worked examples, real numbers, and charts.
Options 101: Calls, Puts, Strike Price, and How They Work
Learn how stock options work — what calls and puts do, how strike price and expiry determine value, and the difference between intrinsic and time value.
What Is the VIX? The Fear Index, Explained
The VIX measures S&P 500 implied volatility over 30 days. Learn how it is calculated, what levels signal fear vs calm, and how investors use it.
What Is the P/E Ratio? And When Does It Mislead?
The P/E ratio divides stock price by earnings per share — but it breaks for unprofitable companies, cyclical earnings, and cross-sector comparisons. Here is what it actually tells you.
Beta, Alpha, and the CAPM: What These Numbers Measure
Beta measures market sensitivity, alpha tracks excess return. Here’s what these numbers mean and four ways CAPM breaks down in practice.
The Yield Curve: What It Is and Why Inversion Matters
Understand the yield curve, what causes inversions, and why they have preceded every U.S. recession since 1955. Includes today’s snapshot.