What is John's profession if he is dealing with a customer wanting to purchase stock?

John's profession is that of a Financial Services Sales Agent because this role involves assisting customers in purchasing financial products, including stocks. Financial Services Sales Agents are knowledgeable about various investment options and provide guidance on stock purchases. They often work for brokerage firms or financial institutions, helping clients understand the market and make informed decisions regarding their investments.

In contrast, a Tax Accountant focuses on preparing tax returns and providing advice on tax-related matters rather than stock purchases. An Insurance Sales Agent deals primarily with selling insurance policies and managing related inquiries. Similarly, a Real Estate Agent specializes in buying and selling properties, not financial investments like stocks. Therefore, the context of dealing specifically with stock purchases aligns John with the role of a Financial Services Sales Agent.