Unrealized Gain

A profit that results from holding on to an asset rather than cashing it in and using the funds.

Investopedia Says:
Let's say you own a stock that has doubled, but you haven't sold it yet. This is said to be an unrealized gain.

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The excess of current Market Value over cost for an asset that is unsold.
Example: Collins bought land for $100,000; she had an offer to buy it for $150,000, but decided to keep the land. Her unrealized gain is $50,000.