There is no guarantee that a diversified portfolio will enhance overall returns or outperform a non-diversified portfolio. Diversification does not protect against market risk. ETFs trade like stocks, are subject to investment risk, fluctuate in market value, and may trade at prices above or below the ETF's net asset value (NAV). Upon redemption, the value of fund shares may be worth more or less than their original cost. ETFs carry additional risks such as not being diversified, possible trading halts, and index tracking errors.