Investors buying or selling fund shares on the secondary market may incur customary brokerage commissions. Market prices may differ to some degree from the net asset value of the shares. Investors who sell fund shares may receive less than the share's net asset value. Shares may be sold throughout the day on the exchange through any brokerage account. However, unlike mutual funds, shares may only be redeemed directly from a fund by authorized participants in very large creation/redemption units. If a fund's authorized participants are unable to proceed with creation/redemption orders and no other authorized participant is able to step forward to create or redeem, fund shares may trade at a discount to a fund's net asset value and possibly face delisting.

A fund's shares will change in value, and you could lose money by investing in a fund. One of the principal risks of investing in a fund is market risk. Market risk is the risk that a particular stock owned by a fund, fund shares or stocks in general may fall in value. There can be no assurance that a fund's investment objective will be achieved. The outbreak of the respiratory disease designated as COVID-19 in December 2019 has caused significant volatility and declines in global financial markets, which have caused losses for investors. While the development of vaccines has slowed the spread of the virus and allowed for the resumption of "reasonably" normal business activity in the United States, many countries continue to impose lockdown measures in an attempt to slow the spread. Additionally, there is no guarantee that vaccines will be effective against emerging variants of the disease.

In managing a fund's investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not have the desired result.

A fund that effects all or a portion of its creations and redemptions for cash rather than in-kind may be less tax-efficient.

A fund may be subject to the risk that a counterparty will not fulfill its obligations which may result in significant financial loss to a fund.

Covenant-lite loans contain fewer maintenance covenants than traditional loans and may not include terms that allow the lender to monitor the financial performance of the borrower and declare a default if certain criteria are breached. This may hinder a fund's ability to mitigate problems and increase a fund's exposure to losses on such investments.

A fund's covered call strategy may limit its ability to distribute dividends eligible for treatment as qualified dividend income and to distribute dividends eligible for the dividends-received deduction for corporate shareholders.

Changes in currency exchange rates and the relative value of non-US currencies may affect the value of a fund's investments and the value of a fund's shares.

As the use of Internet technology has become more prevalent in the course of business, funds have become more susceptible to potential operational risks through breaches in cyber security.

Certain securities are subject to call, credit, inflation, income, interest rate, extension and prepayment risks. These risks could result in a decline in a security's value and/or income, increased volatility as interest rates rise or fall and have an adverse impact on a fund's performance.

Depositary receipts may be less liquid than the underlying shares in their primary trading market.

The use of OTC derivatives including futures, options and forward contracts, can lead to losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivatives.

A fund's investment in dividend-paying securities may cause a fund to underperform similar funds that do not consider an issuer's track record of paying dividends.

A fund may invest in the shares of other ETFs, which involves additional expenses that would not be present in a direct investment in the underlying funds. In addition, a fund's investment performance and risks may be related to the investment performance and risks of the underlying funds.

The market value of floating rate securities may fall in a declining interest rate environment and may also fall in a rising interest rate environment if there is a lag between the rise in interest rates and the reset. Income earned by a fund on floating rate and fixed-to-floating rate securities may decline due to lower coupon payments on floating-rate securities.

High yield securities, or "junk" bonds, are less liquid and are subject to greater market fluctuations and risk of loss than securities with higher ratings, and therefore, are considered to be highly speculative.

Hybrid capital securities are subject to the risks of equity securities and debt securities. The claims of holders of hybrid capital securities of an issuer are generally subordinated to those of holders of traditional debt securities in bankruptcy, and thus hybrid capital securities may be more volatile and subject to greater risk than traditional debt securities.

To the extent a fund invests in floating or variable rate obligations that use the London Interbank Offered Rate ("LIBOR") as a reference interest rate, it is subject to LIBOR Risk. The United Kingdom's Financial Conduct Authority, which regulates LIBOR, will cease making LIBOR available as a reference rate over a phase-out period that will begin immediately after December 31, 2021. The unavailability or replacement of LIBOR may affect the value, liquidity or return on certain fund investments and may result in costs incurred in connection with closing out positions and entering into new trades. Any potential effects of the transition away from LIBOR on a fund or on certain instruments in which a fund invests can be difficult to ascertain, and they may vary depending on a variety of factors, and they could result in losses to a fund.

Certain fund investments may be subject to restrictions on resale, trade over-the-counter or in limited volume, or lack an active trading market. Illiquid securities may trade at a discount and may be subject to wide fluctuations in market value.

Master limited partnerships (MLPs) are subject to certain risks, including price and supply fluctuations caused by international politics, energy conservation, taxes, price controls, and other regulatory policies of various governments. In addition, there is the risk that MLPs could be taxed as corporations, resulting in decreased returns from such MLPs.

Mortgage-related securities are more susceptible to adverse economic, political or regulatory events that affect the value of real estate. They are also subject to the risk that the rate of mortgage prepayments decreases, which extends the average life of a security and increases the interest rate exposure.

There are no government or agency guarantees of payments in securities offered by non-government issuers, therefore they are subject to the credit risk of the issuer. Non-agency securities often trade "over-the-counter" and there may be a limited market for them making them difficult to value.

Securities of non-U.S. issuers are subject to additional risks, including currency fluctuations, political risks, withholding, the lack of adequate financial information, and exchange control restrictions impacting non-U.S. issuers. These risks may be heightened for securities of companies located in, or with significant operations in, emerging market countries.

A fund and a fund's advisor may seek to reduce various operational risks through controls and procedures, but it is not possible to completely protect against such risks.

High portfolio turnover may result in higher levels of transaction costs and may generate greater tax liabilities for shareholders.

Preferred securities combine some of the characteristics of both common stocks and bonds. Preferred stocks are typically subordinated to other debt instruments in terms of priority to corporate income, and therefore will be subject to greater credit risk than those debt instruments.

REITs are subject to certain risks, including changes in the real estate market, vacancy rates and competition, volatile interest rates and economic recession.

Companies that issue loans tend to be highly leveraged and thus are more susceptible to the risks of interest deferral, default and/or bankruptcy. Loans are usually rated below investment grade but may also be unrated. As a result, the risks associated with these loans are similar to the risks of high yield fixed income instruments. The senior loan market has seen a significant increase in loans with weaker lender protections which may impact recovery values and/or trading levels in the future.

A fund with significant exposure to a single asset class, country, region, industry, or sector may be more affected by an adverse economic or political development than a broadly diversified fund.

Securities of small- and mid-capitalization companies may experience greater price volatility and be less liquid than larger, more established companies.

Investments in sovereign bonds involve special risks because the governmental authority that controls the repayment of the debt may be unwilling or unable to repay the principal and/or interest when due. In times of economic uncertainty, the prices of these securities may be more volatile than those of corporate debt or other government debt obligations.

Trading on the exchange may be halted due to market conditions or other reasons. There can be no assurance that the requirements to maintain the listing of a fund on the exchange will continue to be met or be unchanged.

Due to the lack of centralized information and trading, and variations in lot sizes of certain debt securities, the valuation of debt securities may carry more uncertainty and risk than that of publicly traded securities.

First Trust Advisors L.P. is the adviser to the fund. First Trust Advisors L.P. is an affiliate of First Trust Portfolios L.P., the fund’s distributor.