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‹ Options, Explained Lesson 16 of 16
Contents Lesson 16 of 16

5 min read · professional

What have you actually learned about options?

You arrived with a vague sense that options are leverage. You leave able to read the Greeks and name precisely what each side of a contract has agreed to.

The four movements, in one breath

Calls, puts and the asymmetry. An option is a right, never a duty, defined by underlying, strike, expiry and type, with 100 shares per standard US contract. A call's breakeven is strike + premium; a put's is strike − premium. The buyer's loss is capped at the premium, and the upside is open on a call but stops at the strike on a put, since a share cannot fall below zero. The writer's profile is the mirror: gain capped at the premium, loss theoretically unlimited on a naked call and bounded at strike less premium on a naked put — and winning often is not the same as having an edge.

What an option is worth. Moneyness is where the strike sits versus spot, and it is not the same as profit. Premium splits into intrinsic value (what exercising now would be worth, never below zero) and time value (the price of possibility). Time value peaks at the money, is 100% of any OTM premium, and is exactly zero at expiry. It drains roughly with the square root of time — 90 days to 45 removes only about 29% — but the final days are a cliff. Implied volatility restates the traded price as expected movement: double the IV, double an at-the-money premium. That is why options get expensive before earnings, and why the crush afterwards can halve a contract on a day the stock did nothing.

The Greeks. Delta is dollars of option per dollar of stock, and doubles as share-equivalent exposure (4 contracts × 100 × 0.35 = 140 shares' worth) and a rough — model-dependent — gauge of finishing in the money. Gamma is delta's instability: gains accelerate, losses decelerate for the buyer, and the reverse for the writer, peaking at the money and near expiry. Vega is dollars per volatility point, larger for longer-dated contracts. Theta is the daily cost of holding, accelerating into expiry. Together they say: you pay theta every day for the gamma and vega you hold — and they are a local approximation that fails exactly during the gaps that matter.

Exercise, assignment and structures. Buyers exercise; writers are assigned, randomly and without warning. American style means any time, European only at expiry — styles, not geographies. Physical settlement moves real shares and demands strike × 100 in cash; cash settlement pays the difference. In-the-money contracts are auto-exercised at expiry, and early exercise is usually irrational because it discards time value, except around dividends. And two canonical structures: the covered call, which caps your gain at $13 a share, leaves nearly all your downside intact, and has the payoff shape of a short put; and the protective put, which floors the loss at 12%, raises breakeven to $102, and costs roughly 8% a year to maintain.

The one sentence to keep

An option is a priced choice with a deadline: you are always paying, or being paid, for the possibility that something moves far enough, in the right direction, before the clock runs out. Everything else — Greeks, structures, vocabulary — is bookkeeping on that sentence.

The non-negotiable framing

This course is education, not advice, and it will not end with a suggestion.

  • Most retail options buyers lose money over time. This is a documented, population-level finding across multiple markets, not a warning label, and the losses concentrate in short-dated, out-of-the-money contracts — the cheapest-looking ones. Direction, size and timing must all be right; spreads cost you twice; and the price was set by professionals.
  • Writing options can lose far more than the premium received, without limit in the case of a naked call, and margin can force you out of a position before you are proven right.
  • The covered call and the protective put were shown as mechanics illustrations with their costs stated — a capped upside and a barely-touched downside for one, a recurring 8%-a-year drag and a 12% deductible for the other. Neither was recommended, and the fact that a structure is popular says nothing about whether it is suitable for anybody.

Before you sit it

Each of these is a minute at your desk. Any one that is not names the lesson to reopen first.

Try it now

  1. From memory, write down the breakeven formula for a long call and a long put, and the maximum loss for each of the four basic positions (long call, long put, short call, short put). Check yourself against Unit 1.
  2. Pick a contract you have never looked at in the Terminal's options view. It opens on Microsoft's chain; change the symbol there to any underlying you like. For the underlying's price, Apple, Microsoft and Tesla are quoted in the table below, and any other name's price is on its asset page in the Terminal (Microsoft's is the second link). Then produce the full read in ten minutes: moneyness, intrinsic and time value, implied volatility, the Greeks the chain shows plus a vega from the approximation, and the share-equivalent exposure. Then state what would have to happen for it to break even.

Open Microsoft's chain with IV and the Greeks in the EODHD Terminal

Open MSFT.US in the EODHD Terminal

Live API response: der3 three last prices
  1. Say the closing line out loud: "An option is a priced choice with a deadline — and understanding it is not the same as having a reason to trade it." Then take the checkpoint quiz.

A note on what we do here. EODHD Academy teaches how instruments work, using real market data as a laboratory. Nothing in this course is a recommendation to buy, sell, or write anything. Options carry a high risk of loss, including — for writers — losses exceeding the amount received. Every ticker, strike and premium here was an illustration.