This should provide some good entertainment
2016, Publication 17, page 117
Capital Losses
If your capital losses are more than your capital gains, you can claim a capital loss deduction. Report the amount of the deduction on line 13 of Form 1040, in parentheses.
Limit on deduction.
Your allowable capital loss deduction, figured on Schedule D (Form 1040), is the lesser of: $3,000 ($1,500 if you are married and file a separate return), or Your total net loss as shown on line 16 of Schedule D (Form 1040). You can use your total net loss to reduce your income dollar for dollar, up to the $3,000 limit.
Capital loss carryover.
If you have a total net loss on line 16 of Schedule D (Form 1040) that is more than the yearly limit on capital loss deductions, you can carry over the unused part to the next year and treat it as if you had incurred it in that next year. If part of the loss is still un-used, you can carry it over to later years until it is completely used up.
When you figure the amount of any capital loss carryover to the next year, you must take the current year's allowable deduction into account, whether or not you claimed it and whether or not you filed a return for the current year.
When you carry over a loss, it remains long term or short term. A long-term capital loss you
carry over to the next tax year will reduce that year's long-term capital gains before it reduces that year's short-term capital gains.