# Proxy Investment This service can be given by licensed brokers that receive stock purchases orders and execute those purchases on the stock market on behalf of their users. If you are willing to invest in Tesla stock for instance, you can go to the Bills' page and search for an Bill that does proxy investment for Tesla. Once you find one, you can apply for an account and use that account for all you buy/sell orders of the Tesla stock. Anytime you want to buy an amount X in USD of the stock, you create a purchase X USD command on your account by running the Notify Credit function and anytime you want to sell an amount Y in USD of the stock, you create a sell Y USD command on your account by running the Notify Debit function. The Bill admin will regulary withdraw the funds you deposit to purchase the stock or sell it and deposit the funds on your account --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.payswap.org/use-cases/bills/proxy-investment.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.