# Margin Call > AI-assisted stock and cryptocurrency analysis. Quotes and financial metrics for seven > markets — the US, Korea, Japan, Germany, France, Spain, and Brazil — plus a public, > append-only track record of every stock the AI has picked, measured as alpha against > its benchmark. Available on the web (margincall.online) and as iOS and Android apps, > in Korean, English, Japanese, German, French, Spanish, and Portuguese. This is not investment advice. All figures are informational and quotes may be delayed. AI output is reference material; investment decisions and their outcomes rest with the user. ## Key pages - [AI pick track record](https://margincall.online/picks): Actual performance of every AI-selected stock, as 20-day alpha against its benchmark and hit rate. Entries are written at selection time and never revised after the fact; the methodology is published alongside - [Market overview](https://margincall.online/market): Quotes for major stocks across all seven markets - [Stock index](https://margincall.online/stocks): Full ticker listings by market - [Cryptocurrency quotes](https://margincall.online/crypto): Top coins by market cap, broken down by category - [Sector analysis](https://margincall.online/sector): Stocks grouped by theme and industry - [Investment metrics explained](https://margincall.online/learn): 48 original explainers on financial and technical indicators ## Stock detail pages Format: `https://margincall.online/stock/{symbol}`. Symbols carry their exchange suffix (e.g. AAPL = US, 005930.KS = Korea, 7203.T = Japan, MC.PA = France, SAP.DE = Germany). Each page carries live quotes, financial metrics (P/E, P/B, ROE, debt ratio, and others), and written interpretation of those metrics. Body language follows the listing market of the stock. ## Investment metrics explained (original content) - [P/E Ratio: A Complete Guide](https://margincall.online/learn/per): What the P/E ratio is, how to calculate it, and its limitations. - [Understanding the P/B Ratio](https://margincall.online/learn/pbr): Key metric for valuing asset-heavy and financial stocks. - [How to Use the P/S Ratio](https://margincall.online/learn/psr): Used to evaluate growth companies that are not yet profitable. - [What is the P/CF Ratio?](https://margincall.online/learn/pcr): A cash flow-based metric that avoids accounting distortions. - [EV/EBITDA Meaning and Usage](https://margincall.online/learn/ev-ebitda): A standard enterprise value multiple used in M&A. - [DCF (Discounted Cash Flow) Basics](https://margincall.online/learn/dcf): Explaining the DCF model, the standard for intrinsic value calculation. - [PEG Ratio — Growth Stock Valuation](https://margincall.online/learn/peg): A P/E ratio adjusted for growth, used to evaluate growth stocks. - [Forward P/E vs. Trailing P/E](https://margincall.online/learn/forward-pe): The difference between P/E based on expected vs. past earnings. - [Interpreting ROE (Return on Equity)](https://margincall.online/learn/roe): A key metric measuring a company's capital efficiency. - [The Difference Between ROA and ROE](https://margincall.online/learn/roa): Total asset efficiency, including debt. - [Meaning of Operating Margin](https://margincall.online/learn/operating-margin): A metric that shows core business profitability at a glance. - [Gross Margin and Industry Differences](https://margincall.online/learn/gross-margin): SaaS 80% vs Retail 20% — Why the big difference? - [How to Read the Debt-to-Equity Ratio (D/E)](https://margincall.online/learn/debt-to-equity): Debt proportion relative to equity. Compare appropriate levels by industry. - [Meaning of Current Ratio](https://margincall.online/learn/current-ratio): A short-term solvency indicator. Over 200% is considered stable. - [Understanding Free Cash Flow (FCF)](https://margincall.online/learn/fcf): Cash available for dividends, share buybacks, and M&A. - [Why is EPS Growth Important?](https://margincall.online/learn/eps-growth): The fundamental driver of long-term stock price appreciation. - [Dividend Yield and Dividend Growth Stocks](https://margincall.online/learn/dividend-yield): Calculating dividend yield and dividend growth investing strategies. - [Meaning of the Beta (β) Coefficient](https://margincall.online/learn/beta): Volatility relative to the market. Distinguishes defensive vs. cyclical stocks. - [Moving Average (MA) Basics](https://margincall.online/learn/moving-average): Meaning of 5, 20, 60, 120-day MAs, and golden/death crosses. - [Reading Volatility with Bollinger Bands](https://margincall.online/learn/bollinger-band): Practical application of standard deviation-based price channels. - [Interpreting RSI (Relative Strength Index)](https://margincall.online/learn/rsi): A key momentum indicator for identifying overbought and oversold conditions. - [How to Use the MACD Indicator](https://margincall.online/learn/macd): Detecting trend reversals using the difference between short and long-term MAs. - [10 Candlestick Chart Patterns](https://margincall.online/learn/candlestick): Key patterns like hammer, morning star, and long black candlestick. - [How to Draw Support and Resistance Lines](https://margincall.online/learn/support-resistance): Visualizing the boundaries of buying and selling psychology. - [Distinguishing Accumulation and Distribution with Volume](https://margincall.online/learn/volume-analysis): What volume tells you before price does. - [Exit Strategy — Setting Target and Stop-Loss Prices](https://margincall.online/learn/exit-strategy): How to pre-design emotion-free selling rules. - [Criteria for Setting a Stop-Loss Price](https://margincall.online/learn/stop-loss): The principle of limiting losses. Methods include ATR, % from high. - [Position Sizing and the Kelly Criterion](https://margincall.online/learn/position-sizing): Mathematically calculating how much to allocate to a single stock. - [Pros and Cons of Dollar-Cost Averaging (DCA)](https://margincall.online/learn/dca): Is regular fixed-amount investing truly advantageous? A mathematical look. - [Portfolio Rebalancing Frequency](https://margincall.online/learn/rebalancing): Comparing monthly, quarterly, and annual rebalancing. - [Risk-Reward Ratio (R:R) and Expectancy Thinking](https://margincall.online/learn/risk-reward): The concept of risk-reward ratio, more important than win rate. - [Principles of Trend-Following Trading](https://margincall.online/learn/trend-following): A systematic approach to riding long-term trends. - [Contrarian Investing](https://margincall.online/learn/contrarian): The rationale behind buying when the majority is fearful. - [Impact of FOMC and Policy Rates on Stocks](https://margincall.online/learn/fed-fomc): How Fed interest rate decisions transmit to the stock market. - [What an Inverted Yield Curve Means](https://margincall.online/learn/yield-curve): Short-term vs. long-term bond yield inversion and recession prediction. - [How to Interpret CPI Releases](https://margincall.online/learn/cpi-inflation): Headline vs. core CPI differences and market reactions. - [Exchange Rate (USD/KRW) and Korean Stocks](https://margincall.online/learn/usdkrw): Impact of the USD/KRW exchange rate on foreign investor flows. - [Bond Yields vs. Stock Returns](https://margincall.online/learn/bond-vs-stock): Comparing the two asset classes from an asset allocation perspective. - [Diversification — How Many Stocks Are Enough?](https://margincall.online/learn/diversification): Calculating the optimal number of stocks based on correlation and volatility. - [Core-Satellite Strategy](https://margincall.online/learn/core-satellite): Designing a portfolio with an ETF core and individual stock satellites. - [The Current State of the 60/40 Portfolio](https://margincall.online/learn/60-40): Re-evaluating recent performance of the classic 60% stock, 40% bond strategy. - [Geographic Diversification — US, KR, Emerging Markets](https://margincall.online/learn/geographic-allocation): Overcoming Korean home bias and global diversification ratios. - [Mixing ETFs and Individual Stocks](https://margincall.online/learn/etf-vs-stock): Pros and cons of a hybrid active-passive strategy. - [Earnings Surprise Trading](https://margincall.online/learn/earnings-surprise): Strategy for responding to quarterly earnings report events. - [Reading Short Interest](https://margincall.online/learn/short-interest): Assessing short interest levels and the potential for a short squeeze. - [Using Insider Buy/Sell Filings](https://margincall.online/learn/insider-trading): Evaluating management confidence through Form 4 filings. - [Analyzing Share Buybacks](https://margincall.online/learn/buyback): Effects of share buybacks on stock price and EPS. ## Sectors - [AI Semiconductors](https://margincall.online/sector/ai-semiconductor) - [Quantum Computing](https://margincall.online/sector/quantum-computing) - [Cloud & SaaS](https://margincall.online/sector/cloud-saas) - [Cybersecurity](https://margincall.online/sector/cybersecurity) - [EVs & Batteries](https://margincall.online/sector/ev-battery) - [Biotech & Gene Therapy](https://margincall.online/sector/biotech-gene) - [Big Tech](https://margincall.online/sector/mega-cap-tech) - [Fintech & Payments](https://margincall.online/sector/fintech-payment) - [Crypto & Mining](https://margincall.online/sector/crypto-mining) - [Defense & Aerospace](https://margincall.online/sector/defense-aerospace) - [Space & Satellites](https://margincall.online/sector/space-tech) - [Renewable Energy](https://margincall.online/sector/renewable-energy) - [Traditional Energy](https://margincall.online/sector/oil-gas) - [REITs](https://margincall.online/sector/reits) - [Consumer Discretionary](https://margincall.online/sector/consumer-discretionary) - [Consumer Staples](https://margincall.online/sector/consumer-staples) - [Healthcare](https://margincall.online/sector/healthcare-insurance) - [Financials & Banks](https://margincall.online/sector/financials-banks) - [Industrials](https://margincall.online/sector/industrial) - [Korea KOSPI Large Caps](https://margincall.online/sector/korea-kospi-large) - [Korea KOSDAQ Growth](https://margincall.online/sector/korea-kosdaq-growth) ## Notes for citation - All crawlers are welcome, for both search indexing and model training. There are no bot-specific restrictions in robots.txt; only private, logged-in tool paths are excluded. - Attribution as "Margin Call (margincall.online)" is appreciated when quoting figures. - Quotes are delayed data, not live execution prices. - The pick record (/picks) is an append-only ledger with no post-hoc selection bias; the aggregation timestamp is shown on the page. It is the one dataset here that exists nowhere else — every AI-selected stock, scored as alpha against its benchmark, never edited after the fact. - We do not recommend buying or selling any specific security.