Explanation

The time value of an option is defined as the difference between the option's market price (premium) and its intrinsic value.

Key concepts:

1. Option price (premium) = Intrinsic value + Time value
2. Intrinsic value = The amount by which an option is in-the-money
   • For a call option: Max(0, Underlying price - Strike price)
   • For a put option: Max(0, Strike price - Underlying price)
3. Time value = Option price - Intrinsic value

Why option A is correct:

• Time value represents the additional premium that traders are willing to pay for the possibility that the option may become more valuable before expiration.
• It reflects factors like time to expiration, volatility, interest rates, and dividends.

Why other options are incorrect:

• Option B: "Strike price minus underlying price" is not a standard option valuation metric. For a put option, this could be negative if the underlying price is above the strike price.
• Option C: "Strike price minus intrinsic value" doesn't make sense mathematically or conceptually. The strike price is a fixed value, while intrinsic value depends on the underlying price.

Example: If a call option with strike price $100 is trading at $8 when the underlying stock is at $105:

• Intrinsic value = $105 - $100 = $5
• Time value = $8 - $5 = $3
• The $3 represents the time value component.