06 · US Stock Options Primer
For the basic concepts of Options (rights vs obligations, the four elements, in/out of the money, the Greeks), read Options Basics first. This article upgrades that base toward US practice: what the world's most active options market looks like, how to read an option chain, how to run four beginner strategies (with worked numbers), the US-only permission tiers/margin/tax rules, and the most common ways to die. Do not touch any strategy here before the basics of Options are fully digested.
1. Features of the US Options Market
| Feature | Description |
|---|---|
| The world's most active | Under OCC statistics, US options volume has long exceeded half of the global total |
| Underlying types | Single-stock Options (AAPL, TSLA, etc.), index Options (SPX S&P 500, NDX Nasdaq 100), ETF Options (SPY, QQQ) |
| Contract spec | 1 contract = 100 shares (index Options cash-settle; no share count) |
| Expiry cadence | Monthly Options (third Friday of each month) + weekly Options (every Friday) side by side |
| Market-maker depth | Bid-ask spreads on benchmark contracts are razor-thin (often USD 0.01-0.05); the world's deepest liquidity |
| Directional freedom | Two-way trading: buy or sell, naked selling allowed (with permission) — none of the strict seller restrictions of A-shares |
| Type | Examples | Exercise style | Settlement |
|---|---|---|---|
| Single-stock Options | AAPL, TSLA | American | Physical delivery of shares |
| ETF Options | SPY, QQQ | American | Delivery of ETF units |
| Index Options | SPX, NDX | European | Cash-settled (only the difference changes hands, no shares delivered) |
2. American vs European: Why the Exercise Difference Matters in Practice
| Type | Instruments | Feature |
|---|---|---|
| American Options | Single-stock and ETF Options | Exercisable early on any trading day before expiry |
| European Options | Index Options (SPX etc.) | Exercisable only on the expiry date itself |
This is not an academic distinction; it hits live trading in three direct ways:
| Scenario | American (single stock/ETF) | European (index) |
|---|---|---|
| Surprise exercise against the seller | Possible: near ex-dividend dates, holders of in-the-money calls often exercise early for the dividend, forcing the seller to deliver shares | Not possible: exercise only at expiry; you hold in peace |
| Handling deep in-the-money positions | Mind the tail risk of "exercised at any moment" | Held to expiry, auto-settled; the rules are certain |
| Locking in profit early | Exercise anytime (though closing the position is usually the cheaper choice) | Close only; no early exercise |
One-line conclusion: sellers of single-stock/ETF Options must stay alert around ex-dividend dates; index Options (SPX) have no early-exercise problem, but a single contract carries enormous notional value (on the order of USD 60,000) — not the beginner's first learning instrument.
3. Delivery and Settlement
| Step | Rules (per your broker's and the OCC's latest) |
|---|---|
| Options trade settlement | Same as stocks, T+1 settlement (US markets went fully T+1 in May 2024) |
| Post-exercise delivery | Single-stock/ETF Options exercised → T+1 share delivery: exercising a call buys the shares, exercising a put sells the shares |
| Cash-settled products | Index Options settle the difference at the closing settlement price on expiry; cash hits the account directly |
| Automatic exercise | Options in the money beyond a threshold are auto-exercised at expiry (generally ITM ≥ $0.01, broker-dependent); close before expiry if you do not want exercise |
| Early exercise | American-option buyers may submit exercise instructions on any trading day |
The vast majority of traders never exercise — closing before expiry is the norm. Exercise happens to two kinds of people: those who genuinely want to buy/sell the shares at the strike, and those who forgot to close.
4. How to Read an Option Chain
The option chain is the main screen of options trading. Take SPY: each row = the call and the put at one strike for one expiry:
| Field | Meaning | How to read it |
|---|---|---|
| Strike | The agreed buy/sell price at expiry | In/at/out of the money at a glance |
| Expiry | The date the right dies | Monthly = third Friday; weekly = every Friday; plus LEAPS long-dated Options (up to ~2-3 years) |
| Bid / Ask | Best buy / best sell price | Buyers fill at the Ask, sellers at the Bid |
| Spread | Ask − Bid | The wider the spread, the worse the liquidity; in-the-money and front-month benchmark contracts are usually razor-thin |
| Volume / OI | Today's volume / open interest | Liquidity check: low volume + low OI = hard in, hard out |
| IV | Implied volatility | The "how expensive" thermometer; spikes before earnings |
| Delta | How much the option's price moves per USD 1 of the underlying | Directional sensitivity: an at-the-money call ≈ 0.5 |
Monthly vs Weekly Options
| Type | Expiry | Characteristics | For whom |
|---|---|---|---|
| Monthly Options | Third Friday of each month | Best liquidity, gentle Theta decay, the benchmark contracts | Position strategies, covered calls, spreads |
| Weekly Options | Every Friday | Cheap, brutally fast Theta decay, the lottery ghetto | Short-term traders; beginners stay away |
Three steps to picking a contract: fix the expiry first (30-90 days recommended — time value stays manageable without excess decay) → then the strike (directional view + room for error) → finally check the spread and OI to confirm liquidity.
5. Core Strategies in Practice
All prices below merely illustrate the math and are not trading advice of any kind. Assume SPY at USD 600; every strategy uses "1 contract = 100 shares".
1. Covered Call — collecting rent (owning 100 SPY)
Assume you own 100 shares of SPY (at 600) and expect a month of mostly sideways movement:
- Sell 1 call at strike 620, expiring in 30 days, premium 4.00
- Premium income = 4.00 × 100 = USD 400 (credited immediately; hold to expiry or get assigned)
| At expiry | Result |
|---|---|
| SPY < 620 | The option expires worthless; keep the 400 and keep holding the shares |
| SPY ≥ 620 | Assigned: sell at 620; total return = 400 + (620-600)×100 = USD 2,400 (capped) |
- Essence: trading "upside" for "certain cash income" — about 0.7% per month (400 / 60,000), roughly 8% annualized (assuming the underlying does not rally hard)
- The biggest cost: if SPY surges (say to 700), you make only 2,400 instead of 10,000+ — the missed rally
2. Protective Put — insurance (cost vs black swans)
Assume you own 100 shares of SPY (at 600), fear a crash, but do not want to sell:
- Buy a put at strike 570, 60 days out, premium 5.50
- Cost = 5.50 × 100 = USD 550 (the premium, like an insurance fee)
| Scenario | Result |
|---|---|
| SPY rises instead | Lose the 550 premium; keep the stock's gains |
| SPY falls to 570 | The put starts paying; max loss locked = (600-570)×100 + 550 = USD 3,550 |
| SPY crashes 20% in a single week (a March-2020-style move) | The stock loses 12,000, the put pays back nearly 10,000 — total loss still locked within 3,550 |
- Essence: small money buys "disaster insurance" — a slow bleed in calm times (Theta charges daily), a lifeline in a black swan
- Common mistake: when insurance is too dear, picking a further out-of-the-money put (cheaper but thinner protection), or shortening the term (lower premium, shorter coverage window)
3. Cash-Secured Put — getting paid to buy (margin and assignment flow)
Assume you want to buy SPY at 580 (now 600) while collecting some premium:
- Sell a put at strike 580, 30 days out, premium 3.00
- The broker freezes USD 58,000 of margin (strike × 100); selling the put pays 300
| At expiry | Result |
|---|---|
| SPY ≥ 580 | The option expires worthless; keep 300 (about 0.5% on the frozen margin — significant annualized) |
| SPY < 580 | Assigned: buy 100 SPY at 580; effective cost = 580 - 3.00 = USD 577/share |
- Assignment flow: auto-exercised after the expiry close; the shares settle T+1
- Essence: "your target buy price + rent if it never gets there" — like resting a limit buy order that pays you
- Note: if the stock keeps falling after assignment, you carry the holding loss — selling puts is "taking delivery", not a "bottom-picking magic tool"
4. Bull Call Spread
Assume SPY at 600; you expect a moderate rise and find a naked call too expensive:
- Buy the 610 call (premium 12.00)
- Sell the 630 call (premium 5.00)
- Net outlay = (12.00 - 5.00) × 100 = USD 700
| At expiry | Result |
|---|---|
| SPY < 610 | Both expire worthless; lose the full 700 (max loss) |
| SPY between 610-630 | Grind from breakeven into profit |
| SPY ≥ 630 | Max profit = (630-610)×100 - 700 = USD 1,300 |
- Essence: trading "capped gains" for "half the cost"; both risk and reward are defined — the best fit for a moderately bullish view
- Versus a naked call: cost drops from 1,200 to 700, and breakeven sits lower too
Strategy Quick Reference
| Strategy | Construction | Fits | Max risk |
|---|---|---|---|
| Covered Call | Stock + short call | Collecting rent in sideways markets | Upside capped (missed rally) |
| Protective Put | Stock + long put | Insurance for holders afraid of a crash | Premium bleeding over time |
| Cash-Secured Put | Cash + short put | Wanting entry + premium income | The stock keeps falling after assignment |
| Bull Call Spread | Long lower call + short higher call | Moderately bullish | Max loss = net premium |
6. Rules Unique to US Options
Options Permission Tiers (the Tier 1-4 basics)
US brokers approve options in tiers; the naming varies slightly by broker (some use 0-5). Follow your broker's latest scheme:
| Tier | Allowed strategies | Threshold (rule-of-thumb) |
|---|---|---|
| Tier 1 | Covered Call, Cash-Secured Put | Low: stock/cash is enough; beginner-friendly |
| Tier 2 | Long Call / Put buying | Requires an options knowledge questionnaire and some experience |
| Tier 3 | Spreads | Higher knowledge and asset requirements |
| Tier 4 | Naked Call / Put selling | Highest bar: extensive experience, higher net worth, extra broker scrutiny |
Practical meaning: beginners usually start with only Tier 1 — which is in fact protection: naked selling and spreads demand deeper understanding and a thicker capital cushion.
Margin Rules
| Role | Margin requirement |
|---|---|
| Option buyer | The premium only; no margin |
| Cash-secured seller | Strike × 100 in frozen cash (the "secured" in cash-secured — what makes taking delivery safe) |
| Naked seller (margin account) | Per the broker's formula (roughly a fraction of notional + premium); must keep topping up as the market moves against you |
| Portfolio margin | For institutions/whales, computed off a portfolio-wide risk model; effectively unavailable to retail |
Margin shortfall → forced liquidation: the broker may force-close positions once floating losses eat the margin, and forced closes tend to fill at the worst prices.
Tax Basics (non-residents; defer to professionals)
- For non-resident aliens (NRAs filing W-8BEN): US capital gains are generally not taxed in the US — the spread from closing or exercising Options usually does not touch US income tax
- But the following may be withheld or owed:
- Dividends on shares acquired via exercise → 30% dividend withholding
- Under certain conditions, income from selling options can be treated as a "dividend equivalent" and withheld at 30% (classically, high-Delta strategies near ex-dividend dates)
- Spending over 183 days in the US / becoming a US tax resident triggers entirely different rules
- ⚠️ Cross-border tax is extremely complex; this is rule-of-thumb only — defer entirely to professional tax advice and the latest IRS rules
Leverage and Blow-Ups: A Naked Short Force-Liquidated
Account: USD 20,000
Trade: naked-sell 3 TSLA calls at strike 100, premium 2.00 (collect 600)
Setup: TSLA at 95, "it can't possibly reach 100"
Earnings land, TSLA rockets to 150:
Floating loss = (150 - 100) × 3 × 100 = USD 15,000
Margin shortfall → broker force-closes (buys back the 3 calls at market)
Realized loss ≈ USD 14,000+ (far beyond the premium collected; 70% of the account)- In extreme moves (short squeezes, earnings blow-ups), a naked short's loss is theoretically unlimited; a single forced close can swallow the whole account
💀 Naked-selling losses are theoretically unlimited — one forced close swallows the account
In extreme moves (short squeezes, earnings blow-ups), naked-selling losses are theoretically unlimited; a single forced close can swallow the whole account — if the underlying keeps rocketing and the broker cannot close in time, the account can go negative. Never sell naked without ample margin and risk capacity.
- If the underlying keeps rocketing and the broker cannot close in time, the account can end up owing money (negative balance)
7. The Classic Ways to Die
| Death | Typical scene | Ending |
|---|---|---|
| Naked call meets a moonshot | Earnings, a squeeze (GME 2021), a stock doubling in a day | Unlimited loss; years of premium gone in days, possibly owing money |
| Lottery weeklies going to zero | Buying cheap options 1-2 days from expiry (the USD 0.05 lottery ticket) | Theta devours them; 95%+ expire worthless; nine small wins, one total loss |
| Illiquid chains | Deep out-of-the-money, weekly backwaters, pre/after-hours trading | Enormous bid-ask spreads; a round trip loses 30-50% to the spread alone |
| IV crush double-kill | Buying calls before earnings on direction; direction right, volatility collapses after | "Right on direction, losing anyway" |
| Forgetting the expiry date | Holding into expiry without closing | Auto-exercise delivers/takes shares; surprise positions and tax bills |
Summary of deaths: buyers die of time and volatility; sellers die of extreme moves — both bypass your directional call. The first lesson retail traders must learn is "respect".
💀 The two great option deaths: buyers die of time and volatility, sellers die of extreme moves
Buyers die of time and volatility; sellers die of extreme moves — both bypass your directional call. The first lesson retail traders must learn is "respect": even a correct directional call can lose money to time or volatility.
⚠️ Risk Warning
⚠️ Risk Warning
Options are one of the most complex instruments in risk shape and the biggest source of retail losses; this article stresses seller risk above all:
① Seller risk (the biggest minefield): losses on naked Call/Put selling are theoretically unlimited. A single black swan (earnings blow-up, squeeze, circuit breaker) can wipe out years of premium income and leave you owing the broker money. Cash-Secured Puts are cash-collateralized and cannot blow up into debt, but the loss after assignment when the stock keeps falling is just as real. Never sell naked without ample margin, hedging tools, and risk capacity.
② Buyer risk: time decay (Theta) bleeds daily, and most Options expire worthless; the IV collapse after events like earnings produces "right on direction, losing anyway". Lottery weeklies and deep out-of-the-money tickets are the surest ways to lose money.
③ Rule risk: permission tiers, margin formulas, forced-liquidation rules, and exercise/settlement details all defer to your broker's and the OCC's latest rules; cross-border tax defers to professional tax advice.
This article is education and worked examples only; example prices are not investment advice of any kind. Complete your broker's options investor education and risk assessment before considering live trading.