A $43 trillion marketplace. From market structure to options Greeks, from value investing to sector rotation — everything you need to invest with confidence.
In a world of thousands of markets, US equities stand alone. Here's why global capital keeps flowing here.
Before you trade, understand the arena. Exchanges, indices, trading hours, and who you're really trading against.
| Session | US Eastern (ET) | Beijing (Summer) | Beijing (Winter) | Key Characteristics |
|---|---|---|---|---|
| Pre-Market | 04:00 — 09:30 | 16:00 — 21:30 | 17:00 — 22:30 | Low liquidity, wide spreads. Earnings often released here — expect big price gaps. |
| Opening (First 30m) | 09:30 — 10:00 | 21:30 — 22:00 | 22:30 — 23:00 | Highest volatility. Dominant direction often set here. Avoid market orders. |
| Midday Session | 10:00 — 15:30 | 22:00 — 03:30 | 23:00 — 04:30 | Calmer, institutional-dominated. Lunch dip in volume 12–1pm ET common. |
| Closing Auction | 15:30 — 16:00 | 03:30 — 04:00 | 04:30 — 05:00 | Volume surge. ETF rebalancing. Last 15 min reflects strongest institutional consensus. |
| After-Hours | 16:00 — 20:00 | 04:00 — 08:00 | 05:00 — 09:00 | Very low liquidity. Earnings cause outsized moves. Wide bid-ask spreads. |
Mutual funds, pensions, insurers, sovereign wealth funds. Account for 70–80% of daily volume. Their positioning drives market trends — the primary source of "smart money." Track their holdings via quarterly 13F filings.
Market DriversUse complex strategies (long/short, arbitrage, macro, quant) for absolute returns. During volatility, hedge fund deleveraging amplifies declines — understanding this is crucial during extreme market moves.
Long & ShortProvide continuous bid/ask quotes, profiting from the spread. They delta-hedge option positions — the backbone of options market liquidity. Heavy open interest at a strike creates a "magnet effect" near expiry.
Liquidity ProvidersIndividual investors account for ~20–30% of daily volume. Retail collectively tends to buy high and sell low — but informed retail can close the information gap by studying institutional 13F filings and macro trends.
Fastest GrowingThe concepts every serious investor must master. No fluff — only what actually moves the needle.
Valuation is the core of value investing. Even great companies destroy wealth if bought at excessive valuations. And mediocre companies bought cheaply generate outsized returns. These are the five metrics every investor must know:
| Metric | Formula | Normal Range | Key Caveat |
|---|---|---|---|
| P/E Ratio | Price ÷ EPS | Tech 15–40, Finance 8–15 | Compare within sector only; useless for loss-makers |
| Forward P/E | Price ÷ Next 12M EPS | Usually below TTM P/E | Based on analyst estimates — can be very wrong |
| PEG Ratio | P/E ÷ EPS Growth Rate | PEG <1 = undervalued | Peter Lynch's tool — best for growth stocks |
| P/S Ratio | Market Cap ÷ Revenue | SaaS typically 5–20× | Ignores profitability — pair with gross margin |
| EV/EBITDA | Enterprise Value ÷ EBITDA | 8–15× considered fair | Best for cross-sector M&A comparisons |
US companies report quarterly. Earnings releases are when stocks move most violently. The market prices the expectation gap, not the absolute numbers — understanding this separates amateurs from professionals.
Four scenarios that determine the stock's reaction:
| Scenario | Reaction | Why |
|---|---|---|
| Beat + Strong Guide | Usually rallies | Full consensus beat |
| Beat + Weak Guide | Often falls | Future looks worse |
| Beat, already priced in | May fall | "Sell the news" |
| Miss + Strong Guide | May rally | Improving outlook |
Technical analysis isn't a crystal ball — but it's a powerful tool for understanding market psychology and identifying high-probability setups. The core logic: price reflects all known information, and historically recurring patterns have statistical significance.
| Tool | Purpose | How to Use |
|---|---|---|
| MA / EMA | Trend direction | Price above MA = bullish. 20/50/200-day crossovers are major signals. MA200 = the "line in the sand" for long-term trend. |
| RSI | Overbought/Oversold | RSI >70 overbought, <30 oversold. Divergence signals reversal more reliably than level alone. |
| MACD | Momentum & timing | MACD crossing signal line = bullish entry. Divergence from price = leading reversal signal. |
| Bollinger Bands | Volatility bands | Band squeeze = big move incoming. Upper = overbought, lower = oversold in ranging markets. |
| Volume | Confirms moves | High-volume breakout = valid. Low-volume breakout = suspicious. Heavy volume on down days = real selling. |
Short selling distinguishes US markets from most others globally. It makes markets more efficient and gave birth to "short seller report" culture — professionals who expose fraud while profiting from it.
| Long (Buy) | Short (Sell) | |
|---|---|---|
| Mechanism | Buy and hold | Borrow shares, sell, buy back lower |
| Max Gain | Unlimited (theoretically) | 100% (stock goes to zero) |
| Max Loss | 100% of invested capital | Unlimited (stock can rise forever) |
| Borrow Cost | None | Pay borrow rate (can exceed 50% annualized for hard-to-borrow stocks) |
Options give the holder the right — not obligation — to buy or sell an asset at a specific price by a specific date. Used correctly: leverage and hedging. Used carelessly: total loss in days.
| Term | Meaning | Common Beginner Mistake |
|---|---|---|
| Call Option | Right to BUY at strike price | Thinking you must exercise at expiry — you can sell the option itself any time |
| Put Option | Right to SELL at strike price | Forgetting Puts are also hedging tools, not just for shorting |
| Strike Price | Pre-agreed transaction price | Buying deep out-of-the-money options with very low probability of profit |
| Theta (Time Decay) | Daily erosion of option value | Ignoring theta — weekly options can lose 90% in a few days even if direction is right |
| IV Crush | Implied volatility collapse post-event | Buying options before earnings then losing to IV crush after announcement even on a beat |
ETFs are one of the most important financial innovations of the past 20 years. They let investors access nearly any asset class at ultra-low cost with broad diversification. Warren Buffett has publicly stated that regular S&P 500 ETF investing beats most professional managers over the long run.
| Category | Ticker | Tracks | Expense Ratio | AUM |
|---|---|---|---|---|
| Broad Index | SPY | S&P 500 | 0.09% | $530B+ |
| Tech Growth | QQQ | NASDAQ-100 | 0.20% | $280B+ |
| Low-Cost Alt | VOO | S&P 500 (Vanguard) | 0.03% | $450B+ |
| Global Market | VT | Global Stocks (55 countries) | 0.07% | $40B+ |
| Gold | GLD | Gold Price | 0.40% | $55B+ |
| 3× Leveraged | TQQQ | NASDAQ-100 ×3 | 0.88% | ⚠️ Not for long-term hold |
No single factor impacts US stocks more than Federal Reserve interest rate policy. Understanding the macro cycle is the foundational skill for reading broad market direction — everything else is secondary.
| Economic Phase | Rate Direction | Market Impact | Strong Sectors |
|---|---|---|---|
| Early Expansion | Low → Rising | Tech and growth stocks surge | XLK, XLY, QQQ |
| Late Cycle | Aggressive Hiking | Market turbulence; value holds up | XLV, XLP, XLE |
| Recession | High → Pausing | Defensives outperform; dividends in demand | XLU, XLP, GLD |
| Early Recovery | Cutting | Growth, REITs, tech all rally together | QQQ, XLRE, XLK |
Dividend investing is one of the oldest, most time-tested strategies. Quality dividend payers generate stable cash flow through price volatility, and dividend reinvestment compounds wealth dramatically over time.
| Category | Criteria | Examples | Investment Logic |
|---|---|---|---|
| Dividend Kings | 50+ consecutive years of growth | KO · PG · JNJ · CLX | Extreme stability, recession-resistant cash machines |
| Dividend Aristocrats | 25+ consecutive years | MCD · ABT · EMR · AFL | Elite S&P 500 components with proven track records |
| High-Yield | Dividend yield typically 4%+ | T · MO · VZ · XOM | Income focus — check payout ratio sustainability |
| Dividend ETFs | Tracks high-dividend indices | VYM · SCHD · DVY | Diversified, auto-rebalanced, low cost |
US stocks divide into 11 GICS sectors. Understanding sector rotation is key to reading market cycles and positioning ahead of macro shifts.
Rules, order types, and market microstructure you must know before placing your first trade.
Account under $25,000? You're limited to 3 day trades per rolling 5-day period. Exceeding this flags your account as a "Pattern Day Trader" and restricts trading. This trips up many beginners — use a cash account or hold overnight if underfunded.
⚠️ Compliance RuleMarket orders execute immediately but suffer severe slippage in illiquid stocks or during the first minutes of trading. Limit orders specify your price — no slippage, but may not fill. Professional investors almost exclusively use limit orders and avoid market orders at the open.
Execution TipLevel 2 shows the full order book — multiple tiers of bid and ask quotes with size. Heavy bids at a price level signal support; heavy asks signal resistance. Market maker IDs are visible — an essential tool for advanced day traders reading real-time supply and demand.
Advanced ToolStock splits (like Apple's 4:1) lower per-share price and improve liquidity — total market cap unchanged. Share buybacks reduce share count and boost EPS, a major way mature companies return capital. Often more tax-efficient than dividends for US shareholders.
Corporate ActionThe framework that separates professionals from gamblers.
There's no universally best strategy — only the one that fits your personality, time horizon, and risk tolerance. Know your style before you trade.
The professional investor's toolkit. Free and paid resources used by serious market participants globally.
In a market of information asymmetry, continuous learning is the only sustainable advantage. Start today.