IDInveDeckCompare company financials. Understand investing.
INSIGHT SCHOOL · Companies · Economy · Markets
Insight School

INSIGHT SCHOOL

Insight School

Read company financials and understand the forces shaping the economy and markets.

Public Classes 30
01 · PART 01–10Companies and StocksFrom earnings, cash flow and valuation to practical company analysis02 · PART 11–13How the Economy WorksHow business cycles, inflation, central banks and interest rates work03 · PART 14–20Financial Markets and AssetsBonds, exchange rates, credit, real estate, commodities and the global economy04 · PART 21–24Connecting the MarketsRead the broader market through cross-asset relationships and economic indicators

Class Notes

Find a lesson by date, lesson number or topic.

LessonLesson / Writing Date (KST)TopicStatus
Day 12026-10-06What Are You Really Assessing When You Invest in Stocks? — A Complete Map of Company, Economic and Market AnalysisReconstructed
Day 22026-09-21Why P/E Alone Can Mislead — The Differences Between P/E, P/B, EV/EBITDA and FCF YieldAvailable
Day 32026-09-22How Do Revenue, Operating Income and Net Income Differ? — Reading the Income Statement from Top to BottomAvailable
Day 42026-09-23The Balance Sheet as a Financial Health Check — Reading Assets, Liabilities, Equity and Net DebtAvailable
Day 52026-09-24Why Can a Profitable Company Have No Cash? — Operating, Investing and Financing Activities in the Cash Flow StatementAvailable
Day 62026-09-25Why Is FCF Central to Company Value? — Distinguishing OCF, CapEx, Maintenance Investment and Growth InvestmentAvailable
Day 72026-09-27How Do the Three Financial Statements Connect? — The Movement of Net Income, Retained Earnings, Cash and DebtAvailable
Day 82026-09-28How Much Does a Good Company Earn on Invested Capital? — Understanding and Calculating ROICAvailable
Day 92026-09-29The Minimum Return a Company Must Earn — Understanding WACC and the ROIC SpreadAvailable
Day 102026-09-30Converting Future Cash Flows into Today's Value — The Basics of DCF and Company ValuationAvailable
Day 112026-10-01If DCF Enterprise Value Is KRW 500 Billion, Is Market Capitalization Also KRW 500 Billion? — From EV to a Target Share PriceAvailable
Day 122026-10-02Why Do Growth Stocks Fall More When the US 10-Year Treasury Yield Rises? — Linking Bond Yields, Discount Rates and Share PricesAvailable
Day 132026-10-03What Expectations Are Priced into the Stock? — Back-Solving Growth and Margins with Reverse DCFAvailable
Day 142026-10-04Why Do Shares Fall After Strong Earnings? — Reading Consensus, Guidance and Earnings SurprisesAvailable
Day 152026-10-05Why Does a Stock Trade at That Price? — Quotes, Market Orders, Limit Orders and the Order BookAvailable
Day 162026-10-06Not All Share Price Gains Mean the Same Thing — Assessing a Rally Through Trading Volume, Value and TurnoverAvailable
Day 172026-10-07Candlesticks Are Results, Not Causes — Reading Open, High, Low, Close, Trends, Support and ResistanceAvailable
Day 182026-10-08Moving Averages Are Not Predictions — Understanding Average Prices, Trends, Bullish Alignment and LagAvailable
Day 192026-10-09RSI and MACD Are Recalculations of Price — The Limits of Momentum, Overbought Signals and DivergenceAvailable
Day 202026-10-10With Investor Flows, Why They Bought Matters More Than Who Bought — Reading Foreign, Institutional, Retail and Program TradingAvailable
Day 212026-10-11Short Selling Is More Than a Bearish Bet — Reading Securities Lending Balances, Short-Sale Value and Short CoveringAvailable
Day 222026-10-12Why Margin Trading and Forced Liquidations Amplify Declines — Reading Margin Balances, Collateral Ratios and Forced SellingAvailable
Day 232026-10-13How Does the Business Cycle Reach Company Earnings? — Linking Leading, Coincident and Lagging Indicators to Revenue, Inventory and MarginsAvailable
Day 242026-10-14What Does GDP Add Up? — Reading Company Demand Through Real and Nominal GDP, Consumption, Investment and Net ExportsAvailable
Day 252026-10-15Do Higher Prices Raise Revenue and Profit? — CPI, PPI, the GDP Deflator, and Pricing PowerAvailable
Day 262026-10-16Why Do Inflation Shocks Move Interest Rates and Stock Prices Together? — Inflation Expectations, Real Rates, and the Central-Bank Reaction FunctionAvailable
Day 272026-10-17Why Are Market Rates Different When There Is Only One Policy Rate? — Reading the Yield Curve, Term Spreads, and the Term PremiumAvailable
Day 282026-10-18Why Bond Prices and Yields Move in Opposite Directions — Reading Duration, Convexity, and Valuation Gains or LossesAvailable
Day 292026-10-19What Is Added to a Government Yield to Price a Corporate Bond? — Reading Credit Spreads, Ratings, and Default RiskAvailable
Day 302026-10-21Credit Spreads Are the Economy’s Thermometer — Reading the Credit Cycle Through IG, HY, and Default RatesAvailable

29 original lessons and 1 reconstruction. The reconstruction shows its actual writing date while preserving the dates and sequence of the existing lessons.