Vanguard Small-Cap ETF (VB), a passively managed exchange-traded fund, is one of the largest ETFs that track the Small Cap Blend segment of the US equity market. Its top holdings include steel producer Steel Dynamics Inc. ($STLD@US), solar panel producer First Solar Inc ($FSLR@US), and equipment manufacturer IDEX Corp. With a 12-month trailing dividend yield of 1.71 percent, a NAV price of $180.98, and boasts a low expense ratio of 0.05 percent. Small-cap ETFs invest in the stocks of companies with relatively small market capitalizations and offer high rewards at high risk.