Options: contracts, not shares

Options are the asset class most likely to be pushed at you by social media and least likely to be explained honestly. This lesson gives you the mechanics and the traps. It will not make you an options trader; it will let you understand what you are looking at and why beginners lose money in them so reliably.

What an option actually is

An option is a contract between two parties about a stock (or ETF, index, future, or, increasingly, crypto).

A call gives the buyer the right, but not the obligation, to buy 100 shares at a fixed price (the strike) on or before a fixed date (the expiration).
A put gives the buyer the right to sell 100 shares at the strike on or before expiration.

The buyer pays a premium for that right. The seller (or "writer") receives the premium and takes on the obligation to deliver if the buyer exercises. Everything else is consequences of that structure.

A worked example

A stock trades at $100. A call with a $105 strike expiring in 30 days is quoted at $2.00.

One contract covers 100 shares, so the premium is $200.
If the stock is at $110 at expiration, the right to buy at $105 is worth $5 per share, or $500. You paid $200; profit $300, a 150% return on the premium.
If the stock is at $104 at expiration, the right to buy at $105 is worth nothing. You lose the full $200. The stock went up 4% and you lost 100%.
If the stock is at $107, the option is worth $2, exactly what you paid. Break-even is strike plus premium: $107.

Notice the asymmetry: you needed a 7% move in 30 days just to break even. Most stocks do not do that most months. The seller keeps the $200 in every outcome below $105.

Where the premium comes from

An option's price has two parts:

Intrinsic value: what it would be worth if exercised right now. A $95 call on a $100 stock has $5 of intrinsic value. A $105 call has none.
Extrinsic (time) value: everything else. It reflects how much time is left and how much the market expects the stock to move (implied volatility).

Time value decays toward zero as expiration approaches, faster in the final weeks. That decay, called theta, is the cost of holding a long option. Buyers pay it every day; sellers collect it. This is the single most important idea for a beginner: an option you buy is a melting ice cube. You are not just betting on direction; you are betting on direction, size of move, and timing, all at once.

Implied volatility is the other silent killer. Before earnings, options are expensive because everyone expects a big move. After the announcement, uncertainty vanishes, implied volatility collapses, and a call can lose value even though the stock went up. Traders call this "IV crush" and it catches beginners every single quarter.

The Greeks in one table

You will see these on every options screen. You do not need to memorize formulas; you need to know what each one warns you about.

Greek	Measures	What it means for you
Delta	How much the option moves per $1 move in the stock	A 0.30-delta call gains about $0.30 when the stock gains $1; also a rough probability of finishing in the money
Theta	How much value is lost per day from time decay	Your daily rent for holding a long option
Vega	Sensitivity to implied volatility	How much you lose if the market calms down
Gamma	How fast delta changes	Why near-expiry options swing violently

Hours, settlement and exercise

US stock options trade 9:30 am to 4:00 pm Eastern; a few index and ETF options trade until 4:15 pm and some have overnight sessions. Standard monthly options expire the third Friday; most liquid names also have weekly and, for the biggest indexes and ETFs, daily expirations.

American-style options (most stock options) can be exercised any time before expiration. European-style (most index options) only at expiration. In practice, exercise is rare; most traders simply sell the option back before expiry. But if you hold a call that finishes in the money, your broker will typically exercise it automatically and you will wake up owning 100 shares you may not be able to afford. Know your broker's policy.

Leverage

Options are leverage, full stop. $200 controlled $10,000 of stock in the example above. That is 50x. It is why a 10% stock move can be a 150% option gain, and why a 4% stock move in the right direction can still be a 100% loss. Leverage does not care which direction it hurts you in.

Selling options is leverage in the other direction: a small premium collected against a large potential obligation. Brokers restrict it for good reason.

Who is on the other side

In most retail option trades, a market maker. They hedge with the underlying stock, price the option with a model refined over fifty years, and earn the spread, which in options is wide. Retail buys a lot of short-dated out-of-the-money calls; market makers sell them, hedge, and collect the decay. Not a conspiracy, a business model, and it tells you which side is structurally paid.

Key idea: An option is a bet on direction, magnitude and timing simultaneously, with time decay working against the buyer every day. The high percentage gains you see advertised are the same leverage that turns a small, correctly-timed loss into a total one.

Why beginners lose in options

Buying cheap, short-dated, far-out-of-the-money contracts because they are "affordable". These are lottery tickets with a known negative expectation.
Using market orders into wide spreads (Module 3).
Ignoring IV crush around earnings.
Sizing by contract count instead of dollars at risk. Ten contracts of a $0.50 option is $500; ten contracts of a $5 option is $5,000.
Not understanding assignment when selling.

Treat this lesson as a warning label; take a dedicated options course before risking money.

Try it: Pull up an option chain for a large stock. Pick a call about 5% above the price, expiring in about 30 days. Write down the bid, the ask, the spread as a percentage of the mid, the delta, and the theta. Then calculate the break-even price. Ask yourself honestly how often that stock moves that far in a month.

Recap

A call is the right to buy, a put the right to sell, 100 shares at the strike by expiration; the buyer pays a premium, the seller takes the obligation.
Premium is intrinsic value plus time value; time value decays daily (theta) and collapses when implied volatility falls.
Options are 20-100x leverage; small stock moves become total losses as easily as large gains.
Market makers are on the other side of most retail option trades and are structurally paid by spreads and decay.
Beginners lose by buying cheap short-dated contracts, using market orders, and ignoring IV crush; learn properly before trading them.