Vanguard Utilities Index Fund Admiral Shares 

This economical index fund offers targeted exposure to the utilities segment of the U.S. stock market. It invests in companies primarily involved in the distribution of electricity, water, or natural gas, as well as independent power producers. A key drawback is its concentrated nature, as it invests exclusively in utility-related equities. Due to this specialized focus, investors should anticipate substantial price fluctuations. Therefore, this fund is best suited as a minor, supplementary holding within an already broadly diversified investment strategy.