What does Net unrealized appreciation mean, and what figure should I use?

[siggyisgone]

On my Social Security 1099 Box 6what doess Net unrealized appreciation mean?

[ThomasM125]

I believe you are referring to a Form 1099-R.  The amount in box 6 would refer to a situation where you received a distribution from a pension plan that included securities (stock) of the employer's company. You have the choice of including the income earned on those securities in the current year, or doing that in the year that you sell the securities. The net unrealized value is the increase in value of the securities that have not been sold yet.

Here is what it says on the form 1099-R: