Unrealized Loss
A loss that results from holding onto an asset rather than cashing it in and officially taking the loss.
Investopedia Commentary
Let's say you own a stock that is down 50%, but you haven't sold it to realize the loss yet. This is said to be an unrealized loss.
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See also: Capital Gain, Capital Loss, Realized Loss, Tax Gain/Loss Harvesting, Unrealized Gain
Also spelled: un-realized loss
unrealized loss