The antonyms for the word "bought stock" would be "sold stock." In the world of investing, buying and selling stocks are two opposite actions that can affect one's financial standing. When purchasing stocks, an investor aims to acquire ownership in a particular company with the hope of earning returns in the long run. On the other hand, selling stocks means letting go of one's ownership in a company, and often done to realize profits or manage risks. It is important to carefully weigh the pros and cons of buying and selling stocks before making any investment decisions to ensure financial stability and success.