Fidelity Puritan Fund Class K (FPUKX) is a mutual fund that focuses on providing a balanced portfolio of both stocks and bonds. It is managed by Fidelity Investments and aims to provide long-term growth and income for investors. This fund is classified as a "balanced fund" as it invests in a mix of both equities and fixed-income securities. It is suitable for investors looking for a diversified investment option with a moderate level of risk. Fidelity Puritan Fund Class K has a low expense ratio and a history of consistent returns, making it a popular choice among investors.