Buying Calls and Puts, Explained

The basics

A long call is the right to buy 100 shares at the strike before expiry — you buy it when you expect the stock to rise. A long put is the right to sell 100 shares at the strike — you buy it when you expect a fall. In both cases the premium you pay is the most you can lose.

Long call — the numbers

Stock at $50. You buy the $50 call for $2.00 ($200).

• Max loss: the $200 premium, if the stock is at or below $50 at expiry.
• Max profit: theoretically unlimited — the higher the stock climbs, the more the call is worth.
• Breakeven: $52 (strike + premium). The stock must clear $52 just to break even.

Long put — the numbers

Stock at $50. You buy the $50 put for $2.00 ($200).

• Max loss: the $200 premium.
• Max profit: up to $4,800 if the stock goes to $0 ($50 strike − $2 premium, × 100).
• Breakeven: $48 (strike − premium).

Why this is harder than it looks

To win buying options you have to be right about three things at once: direction, the size of the move, and the timing. Every day that passes, time decay bleeds value out of your option. A stock can drift your way and you can still lose, because it didn't move far enough, fast enough.

The IV trap

Buyers also fight implied volatility. Buy when IV Rank is high and you're overpaying; if volatility then falls (an "IV crush," common right after earnings) your option loses value even if you nailed the direction. Buyers generally want low IV Rank.

When buying makes sense

• You expect a large move soon, tied to a specific catalyst or timeframe.
• IV is low, so you're not overpaying for that move.
• You want strictly defined risk — e.g. buying a put instead of shorting a stock.

Many traders prefer debit spreads over naked long options to cut the cost and the time-decay drag.

How TickerRisk helps

Use the IV Rank data on the options page to avoid buying when premium is expensive, and the calendar to line a purchase up with (or steer clear of) a catalyst.