Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Are assets lost in a bankruptcy valued at the time of loss, or according to current value?
You are not the person or entity against whom the crime was committed, so the Casualty Loss (theft) deduction doesn't apply here. You should report this as a Capital Loss, the same way all of the Enron shareholders did in their 2001 tax returns. Your cost basis is whatever you originally paid for the shares. The final value is presumably zero. You can declare a maximum capital loss of $3000, so if your net capital loss for the year is greater than that, you'll have to carry over the remainder to the following years. IRS publication 547 states: Decline in market value of stock.   You can't deduct as a theft loss the decline in market value of stock acquired on the open market for investment if the decline is caused by disclosure of accounting fraud or other illegal misconduct by the officers or directors of the corporation that issued the stock. However, you can deduct as a capital loss the loss you sustain when you sell or exchange the stock or the stock becomes completely worthless. You report a capital loss on Schedule D (Form 1040). For more information about stock sales, worthless stock, and capital losses, see chapter 4 of Pub. 550.