Buying calls and puts
Lesson 16 · about 9 min
Buying an outright call or put is the simplest option trade and, done carelessly, the most reliable way to lose money in this market. Done with a clear reason, a chosen strike and expiry, and a written exit, it is a legitimate tool with a specific job: a defined-risk, leveraged bet on a move within a time window.
What you are actually buying
When you buy a call you are buying three things at once:
- Direction: you want the stock up (delta).
- Speed: you need it up before the extrinsic value decays (theta versus gamma).
- Volatility exposure: you gain if the market starts expecting bigger moves, lose if it stops (vega).
If you only have an opinion about the first one, you are taking two other positions by accident. The next lessons are about making the second and third deliberate.
The full payoff table
XYZ at $50. You buy the 45-day $50 call for $2.40 ($240). Delta 0.53, theta −0.030, vega 0.070, IV 30%.
At expiration:
| XYZ at expiry | Intrinsic | P&L per share | P&L per contract | Return on premium |
|---|---|---|---|---|
| 44 | 0.00 | −2.40 | −$240 | −100% |
| 47 | 0.00 | −2.40 | −$240 | −100% |
| 50 | 0.00 | −2.40 | −$240 | −100% |
| 52.40 | 2.40 | 0.00 | $0 | 0% (breakeven) |
| 54 | 4.00 | +1.60 | +$160 | +67% |
| 56 | 6.00 | +3.60 | +$360 | +150% |
| 60 | 10.00 | +7.60 | +$760 | +317% |
Compare with buying 100 shares at $50 for $5,000:
| XYZ at expiry | Stock P&L | Call P&L | Stock return | Call return |
|---|---|---|---|---|
| 44 | −$600 | −$240 | −12% | −100% |
| 50 | $0 | −$240 | 0% | −100% |
| 52.40 | +$240 | $0 | +4.8% | 0% |
| 56 | +$600 | +$360 | +12% | +150% |
| 60 | +$1,000 | +$760 | +20% | +317% |
The call loses less in dollars on a drop and makes a larger percentage on a rally, but it needs the stock up 4.8% just to break even, while stock breaks even at zero. Between $50 and $52.40, the stockholder makes money and the call holder loses. That band, the extrinsic value you paid, is the cost of leverage and limited risk.
Before expiration
Most buyers do not hold to expiration, so the table above understates the picture. Before expiry, the call retains extrinsic value and the P&L curve is smoother. Using delta and gamma from Module 3, after two weeks with 31 days left:
| XYZ | Approx call value | P&L per contract |
|---|---|---|
| 47 | 0.95 | −$145 |
| 50 | 1.90 | −$50 |
| 52 | 3.10 | +$70 |
| 54 | 4.60 | +$220 |
At $50 you are down $50 (two weeks of theta). At $52, below the expiry breakeven of $52.40, you are up $70, because the call still holds $1.10 of extrinsic value. A buyer who exits on the move, not at expiration, does not need the stock to reach the breakeven; they need it to move soon enough that the gain in intrinsic plus remaining extrinsic beats the theta paid. This is why exit rules (lesson 4) matter as much as entry.
Puts are the mirror
Buying a put is the same structure pointing down. The $50 put for $2.30 breaks even at $47.70 at expiration, makes $770 if XYZ falls to $40, and loses the $230 if XYZ finishes at $50 or above. Two additional points:
- A long put's upside is capped at strike minus premium (the stock cannot go below zero): $47.70 × 100 = $4,770 here. In practice that limit does not matter.
- Puts carry higher IV than calls at the same distance (skew, Module 4), so they cost more per unit of protection. Buying puts as a standing hedge is expensive; buying them for a specific, timed reason is what they are for.
Key idea: A long option is a bet on direction, speed and volatility together. The premium is the price of leverage plus limited risk, and it is lost in full whenever the move is too small or too late.
The three questions before buying
- Why this direction, and why now? If the answer includes a date (earnings, a product event, a technical level being tested) it is a candidate for an option. If it is "I think it goes up eventually", buy stock or a very long-dated option instead.
- How far and how fast? The move has to exceed the breakeven within the window or, if exiting early, has to happen early enough to beat theta.
- Is IV low, normal or high for this stock? From Module 4. Buying at a high percentile means paying for volatility that may collapse on you.
If you cannot answer all three in a sentence each, the trade is not ready.
Try it: Take a stock you would like to own. Build the expiration payoff table for buying 100 shares versus buying one ATM 45-day call, at five prices from −10% to +20%. Find the price range where the stock does better than the call. Write down how often you think the stock lands in that range.
Recap
- A long call or put is a bet on direction, speed and volatility at once; be deliberate about all three.
- Breakeven at expiration is strike plus premium (call) or strike minus premium (put); between the strike and breakeven the buyer loses while a stockholder gains.
- Before expiration the option retains extrinsic value, so early exits can profit without reaching the expiry breakeven.
- Puts cost more than calls at the same distance because of skew; buy them for timed reasons, not as a standing habit.
- Answer why, how far and how fast, and what IV is doing, before every purchase.