The Financial Select Sector SPDR Fund, commonly known as XLF, is a well-known exchange-traded fund (ETF) that focuses on the financial sector of the United States. Managed by State Street Global Advisors, it aims to mirror the performance of the Financial Select Sector Index. XLF invests in a variety of financial companies, covering both growth and value stocks across different market capitalizations. Launched in 1998, it offers investors exposure to the financial industry, including banks, insurance companies, and investment firms.