How Does Exercising a Call Option Affect the Tax Basis of the Acquired Underlying Asset?

When a call option is exercised, the premium paid for the option is added to the strike price paid for the underlying asset. This total amount becomes the cost basis of the newly acquired underlying asset for tax purposes.

The holding period of the option itself does not transfer; the holding period for the underlying asset begins on the day after the exercise date.

How Is the Gain/loss Calculated upon the Sale of Stock Acquired via a Call Option Exercise?
Why Is Exercising an American Call Option Early to Capture a Large In-the-Money Value Still Usually a Poor Decision?
What Is ‘In-the-Money’ and How Does It Relate to Exercising an Option?
How Does the “Strike Price” of the Call Option Affect the Premium Received?
What Is the “Cost of Carry” in Traditional Futures Markets?
What Is the “Cost Basis” of an Asset Received via Physical Settlement?
How Does Selecting a Different Strike Price Change the Risk-Reward Profile for an Option Buyer?
How Does the Choice of Strike Price Affect the Option Premium?

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