Series I Bonds Explained: Composite Rate, Inflation Math, Tax
Understand how Series I savings bonds work, including the composite rate formula, inflation adjustments, 12-month lockup, early penalties, and tax rules.
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.
McDonald’s Unveils $8.5B Plan and Low-50s Margin Goal
McDonald’s sets 2030 financial targets, committing $8.5B in franchisee support, deploying ArchIQ AI, and targeting low-to-mid 50% operating margins.
Qualified vs. Ordinary Dividends: Tax Rules Explained
Understand how qualified dividends differ from ordinary dividends, the IRS 60-day holding period rule, Form 1099-DIV reporting, and tax calculations.
Halozyme Inks $1.5B Convertible Debt Deal and Capped Calls
Halozyme closed a $1.5B convertible debt offering with capped calls, refinancing 2027 and 2028 notes while securing over $630M in fresh liquidity.
DoorDash Inks $131.5M NYC Delivery Worker Settlement
DoorDash agreed to a $131.5 million settlement with New York City resolving food delivery pay compliance issues, backed by $4.42 billion in company cash.
Treasury Bills: Discount Rate vs. Investment Yield Explained
Understand why Treasury bills quote both a discount rate and investment yield, how the 360 vs 365-day math works, and how to calculate your true return.
Group 1 Automotive Inks Pact With Conifer, Expands Board
Group 1 Automotive entered a stockholder agreement with 12.7% owner Conifer Management, expanding its board to 11 and capping Conifer at 19% ownership.
Tax-Equivalent Yield: How to Compare Munis and Treasuries
Learn how to calculate tax-equivalent yield (TEY) to compare municipal bonds, U.S. Treasuries, and corporate debt on a true after-tax basis.
NCMI Buys Captivate for $275M to Form 48,000-Screen Ad Network
National CineMedia completed its $275 million acquisition of Captivate, funded by a new Crestline first-lien term loan, uniting 48,000 screens across 185 DMAs.
Zero-Coupon Bonds: How STRIPS Work, Pricing Math, and Taxes
Learn how zero-coupon bonds and Treasury STRIPS work, how their pricing and duration are calculated, and how IRS phantom tax rules apply to OID.