Calls, Puts & Strike Prices

Strike price is the price at which you can exercise your option. "In the money" means exercising would be profitable now. "Out of the money" means it wouldn't. Time value erodes daily as expiration approaches.

Quick quiz and answers

A call option with a $150 strike is "in the money" when the stock trades at:

Answer: $160. A call is in-the-money when the stock price is ABOVE the strike ($160 > $150 means you can buy cheap and profit).

What is "time decay" (theta) in options?

Answer: The loss of option value as expiration approaches. Theta measures time decay — options lose value daily as expiration nears, hurting buyers and helping sellers.

Which option has more time value, all else equal?

Answer: 1 year to expiration. More time = more time value. A 1-year option has far more time for the stock to move favourably.

An "at-the-money" option is when:

Answer: The strike price equals the current stock price. At-the-money (ATM) means the strike equals the current stock price — the option is right at the breakeven point.

Practice this with $10,000 in virtual cash in Tradecraft, free paper trading with real market data.

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Educational content only, not investment advice. Tradecraft is a simulator; no real securities are bought or sold.