Have you ever invested in a company only to see its stock value plummet? (This may become relevant in light of recent market volatility.) While such an investment might be something you’d rather forget, there’s a silver lining: you can claim a capital loss deduction on your tax return. Here are the rules when a stock you own is sold at a loss or is entirely worthless. How capital losses work As capital assets, stocks produce capital gains or losses when they’re sold. Your capital gains and losses for the year must be netted against one another in a specific order based on whether they’re short-term (held one year or less) or long-term (held for more than one year). If, after netting, you have short-term or long-term losses...