How Short Selling Works: Short Interest and Squeezes
Short selling lets investors profit from falling prices. Learn how it works, what short interest means, and what triggers a short squeeze.
Market Education
Learn how stocks, bonds and capital markets work. Explore plain-English explanations, worked examples and charts, then follow related coverage to connect market concepts with current events. Find your way around ECMSource.
Options Greeks Explained: Delta, Gamma, Theta, and Vega
Learn what the five options Greeks actually mean — delta, gamma, theta, vega, and rho — with worked examples, a data table, and charts that show how each measure changes in real market conditions.
Options 101: Calls, Puts, Strike Price, and Premium Explained
Learn how options work — what calls and puts are, how premiums are priced, and the difference between intrinsic and extrinsic value. Includes payoff diagrams.
What Is the P/E Ratio? How to Use It (and When It Misleads)
The P/E ratio is Wall Street’s most-quoted valuation metric. Here’s what it measures, how to calculate it, and the five ways it can mislead you.
The Yield Curve Explained: Shapes, Inversion, and What It Signals
Learn how the yield curve works, why it inverts, and what historical inversions have meant for the US economy — with verified current Treasury yield data from the Federal Reserve.
Investment Grade vs. High Yield: Credit Ratings, Spreads, and Default Risk
The difference between investment grade and junk bonds comes down to credit ratings, spreads, and default risk. Here’s how to read the credit market’s most important signals.
How to Read a Quarterly Earnings Report
A step-by-step guide to reading earnings reports — income statement, cash flow, EPS, guidance, and what Wall Street really watches each quarter.
Sector Rotation: What It Is and How to Track It
Learn how sector rotation works, why sectors trade in cycles, and which SPDR ETFs to watch at each phase of the economic clock.
Bond Pricing, Yield, and Duration: The Complete Guide
Why do bond prices fall when yields rise? Learn how bond pricing, yield to maturity, duration, and convexity work — with real examples and current Treasury data.
How an IPO Actually Works: S-1, Bookbuilding, and the Greenshoe
A plain-English guide to how companies go public — from the S-1 filing to bookbuilding, pricing night, and the greenshoe stabilization option.