Answer:
Trading.
Step-by-step explanation:
In Business management, when a gain or loss is realized, it simply means that the owner of stock or other securities has sold it. Thus, these unrealized gains or losses are generally referred to as paper profits or losses.
Basically, when the value of a stock being bought by an investor reduces (falls) while he or she is yet to sell it, it is known as an unrealized loss.
However, when the value of a stock being bought by an investor rises (increases) while he or she is yet to sell it, it is known as an unrealized gains.
Hence, unrealized holding gains or losses which are recognized in income are from debt securities classified as trading.