It is not possible to buy Oxycodone, a prescription opioid pain medication, on the stock market. The stock market is a platform where publicly traded companies issue and trade shares of stock. It is not a marketplace for purchasing controlled substances or medications.
However, it is possible to buy and sell stocks of pharmaceutical companies that manufacture and distribute Oxycodone and other medications. These companies are listed on major stock exchanges and their stock prices can be influenced by a variety of factors, including the demand for their products, regulatory decisions, and economic conditions.