Vanguard Russell 2000 Index 

This fund invests in the companies that compose the Russell 2000 Index, a broadly diversified measure predominantly consisting of smaller American businesses. Its primary aim is to replicate the index's returns, which acts as a standard for the performance of small-capitalization U.S. stocks. The ETF offers considerable potential for investment growth; however, its value typically experiences more pronounced swings than portfolios invested in bonds. It is therefore best suited for investors with long-term aspirations who prioritize substantial wealth accumulation.