📄️ 01. What Is Interest?
Learn what interest is, why lenders charge it, and how it affects loans, savings accounts, and your personal finances with practical examples.
📄️ 02. Why Lenders Charge Interest
Understand why lenders charge interest: time value of money, default risk, and opportunity costs. Learn how risk premiums affect interest rates.
📄️ 03. Simple Interest
Master simple interest calculations with clear formulas, worked examples, and comparisons to compound interest. Includes real-world applications.
📄️ 04. Compound Interest
Understand compound interest and why it's called the eighth wonder of the world. Learn the formula, real examples, and long-term wealth implications.
📄️ 05. APR vs APY
Master the critical difference between APR and APY. Learn how compounding affects stated rates and why comparing them correctly saves thousands.
📄️ 06. Continuous Compounding
Understand continuous compounding, Euler's number, and why mathematicians prefer e^(rt). Learn where continuous compounding appears in real finance.
📄️ 07. Nominal vs Real Rates
Master nominal vs real interest rates with the Fisher Equation. Learn why inflation-adjusted returns matter more than headline rates.
📄️ 08. Negative Interest Rates
Understand negative interest rates used by ECB, Bank of Japan, and others. Learn how central banks punish cash hoarding and the real-world effects.
📄️ 09. Federal Funds Rate
Understand the federal funds rate, the most important interest rate in the U.S. economy. Learn how the Fed's target range affects your mortgage, credit card, and savings rates.
📄️ 10. How Fed Moves Rates Today
Learn how the Federal Reserve uses IORB (Interest on Reserve Balances) and ON RRP (Overnight Reverse Repo) to control the federal funds rate in modern monetary policy.
📄️ 11. Rate Transmission Mechanism
Understand how Federal Reserve interest rate changes transmit through the economy affecting credit, employment, inflation, and financial markets. Learn the channels and timelines.
📄️ 12. Rates and Stocks
Learn how interest rates affect stock prices through the discount-rate effect. Understand why rising rates reduce valuations and how tech stocks are most sensitive.
📄️ 13. Rates and Bonds
Understand the fundamental inverse relationship between interest rates and bond prices. Learn duration, yield to maturity, and why rising rates cause bond price declines.
📄️ 14. Rates and Housing
Understand how mortgage interest rates affect housing affordability and home prices. Learn the amortization formula, affordability ratios, and real-world housing market impacts.
📄️ 15. Rates and the Dollar
Discover how interest rates directly affect USD strength and global currency markets. Learn the mechanisms, real-world examples, and economic impacts of rate hikes on the dollar.
📄️ 16. Yield Curve Intro
Learn how the yield curve works, why it matters for economic forecasting, and what different curve shapes signal about future interest rates and recession risk.
📄️ 17. Inverted Yield Curve
Explore what an inverted yield curve signals about recessions. Learn the historical track record, why inversions occur, and how to interpret this critical economic indicator.
📄️ 18. Risk-Free Rate
Learn what the risk-free rate is, why U.S. Treasuries define it, how it affects all other interest rates, and its critical role in valuation models and investment decisions.
📄️ 19. Credit Spread
Understand credit spreads, how they reflect default risk, and why they widen during recessions. Learn to interpret spreads as market signals of financial health and economic conditions.
📄️ 20. Mortgage Rates
Compare fixed-rate vs adjustable-rate mortgages with real numbers, risk analysis, and the lessons from the 2008 housing crisis.
📄️ 21. Credit Card APR
Understand how credit card APR compounds daily, the minimum payment trap, and strategies to escape high-interest debt.
📄️ 22. Savings Account APY
Understand why bank savings rates lag the Fed, how APY compounds, and how to find high-yield accounts earning 4–5%+ APY.
📄️ 23. Zero Rates
Understand the 2008 financial crisis response, quantitative easing, forward guidance, and why zero rates reshape economies for years.
📄️ 24. Rate Cycles
Understand interest rate cycles repeating every 5–7 years, turning points to watch, and how to position your finances at each phase.