Mutual Fund Summary Prospectus (497k)

LOGO

Before you invest, you may wish to review the Fund’s Prospectus, which contains more information about the Fund and its risks. You may obtain the Prospectus and other information about the Fund, including the Statement of Additional Information (SAI) and most recent reports to shareholders, at no cost by visiting http://guggenheiminvestments.com/services/prospectuses-and-reports, calling (800) 820-0888 or e-mailing sservices@sg-investors.com. The Fund’s Prospectus and SAI, both dated February 28, 2013, as revised from time to time, and the Fund’s most recent shareholder reports, are incorporated by reference into this Summary Prospectus.

Guggenheim Russell Top 50 ^® Mega Cap ETF (XLG)

INVESTMENT OBJECTIVE

The investment objective of the Guggenheim Russell Top 50 ^® Mega Cap ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the daily performance of the Russell Top 50 ^® Mega Cap Index Total Return (the “Underlying Index”).

FEES AND EXPENSES OF THE FUND

The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.


SHAREHOLDER FEES (fees paid directly from your investment)			None
ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Management Fees			0.20%
Distribution (12b-1) Fees			0.00%
Other Expenses*			0.00%
Total Annual Fund Operating Expenses			0.20%

*	Other Expenses were less than 0.01% for the fiscal year ended October 31, 2012.

EXAMPLE

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you pay when purchasing or selling shares of the Fund. If the commissions were included in the Example, your costs would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:


1 Year		3 Years		5 Years		10 Years
$	20	$	63	$	112	$	254

PORTFOLIO TURNOVER

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. This rate excludes the value of portfolio securities received or delivered as a result of in-kind creations or redemptions of the Fund’s shares. During the most recent fiscal year, the Fund’s portfolio turnover rate was 7% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, derivatives or securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments where included, the Fund’s portfolio turnover rate might be significantly higher.

PRINCIPAL INVESTMENT STRATEGIES

The Fund invests in securities in order to meet its investment objective of replicating its Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal-weighted version comprised of the 50 largest companies in the Russell 3000 ^® Index, which is an unmanaged capitalization-weighted index that offers investors access to the broad U.S. equity universe representing approximately 98% of the U.S. equity market. As of December 31, 2012, the Underlying Index included companies with a capitalization range of $26.9 billion to $499.7 billion.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. The Fund offers investors access to the largest capitalization segment in the U.S. equity universe representing approximately 40% of the U.S. stock market. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Fund may hold up to 10% of its


2				SUMMARY PROSPECTUS

assets in securities not included in the Underlying Index. The Advisor expects that over time, if the Fund has sufficient assets, the correlation between the Fund’s performance, before fees and expenses, and that of the Underlying Index will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may also invest its other assets in futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash, cash equivalents, such as repurchase agreements, and shares of investment funds, including money market funds. Certain of the Fund’s derivative investments may be traded in the over-the-counter (“OTC”) market. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivative positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.

PRINCIPAL RISKS

As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Correlation and Tracking Error Risk– A number of factors may affect the Fund’s ability to track its benchmark index or achieve a high degree of correlation with its benchmark either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and those of its Underlying Index, rounding of share prices, regulatory policies, high portfolio turnover rate and the use of leverage all contribute to tracking error or correlation risk. There can be no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective.

Derivatives Risk– Derivatives may pose risks in addition to and greater than those associated with investing directly in securities or other investments, including risks relating to leverage, imperfect correlations with underlying investments or the Fund’s other portfolio holdings, high price volatility, lack of availability, counterparty credit, liquidity and valuation. Their use is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Advisor is incorrect about its expectations of market conditions, the use of derivatives could also result in a loss, which in some cases may be more than the amount invested. Some derivatives may trade in OTC markets, which are largely unregulated.

ETF Shares Trading Risk– An unanticipated early closing of the NYSE Arca, Inc. (the “Exchange”) may result in a shareholder’s inability to buy or sell shares of the Fund on that day. Trading in Fund shares similarly may be halted by the Exchange because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Shares also may trade on the Exchange at prices that differ from (and can be below) their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices may not reflect these market values. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Investment in Investment Companies Risk– Investing in other investment companies, including money market funds, subjects the Fund to those risks affecting the investment company, including the possibility that the value of the underlying securities held by the investment company could decrease. Moreover, the Fund and its shareholders will incur its pro rata share of the underlying investment company’s expenses.

Large-Capitalization Securities Risk– The Fund is subject to the risk that large-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and may not be able to attain the high growth rate of smaller companies, especially during extended periods of economic expansion.

Liquidity and Valuation Risk– In certain circumstances, it may be difficult for the Fund to purchase and sell particular investments within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid and unable to realize what the Advisor believes should be the price of the investment.


SUMMARY PROSPECTUS				3

Market Risk– The Fund’s investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund’s NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk– The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single security could cause greater fluctuations in the NAV of Fund shares than would occur in a diversified fund.

Passive Investment/Index Strategy Risk– The Fund has an investment strategy that is designed to track the performance of its Underlying Index and is not actively managed. The Advisor does not base its securities selection based upon its view of the relative benefits and detriments of issuers or securities, and the Advisor does not attempt to purchase or sell securities due to declining market prices or changes in an issuer of a security held by the Fund or otherwise take defensive positions in declining markets. The Fund will purchase, hold or sell securities when an actively managed fund would not do so. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Trading Halt Risk – An exchange or market may issue trading halts on specific securities or derivatives, or may close early or late, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments or may incur substantial trading losses.

PERFORMANCE INFORMATION

The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at www.guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800-820-0888.

The performance information shown below is based on a calendar year.

LOGO


Highest Quarter Return				Lowest Quarter Return
6/30/2009 13.84%				12/31/2008 -18.71%


4				SUMMARY PROSPECTUS

AVERAGE ANNUAL TOTAL RETURN

(for periods ended December 31, 2012)

The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).


	Past 1 Year		Past 5 Years		Since Inception (5/4/2005)
Return Before Taxes		15.35%		0.89%		3.75%
Return After Taxes on Distributions		14.97%		0.44%		3.35%
Return After Taxes on Distributions and Sale of Fund Shares		10.48%		0.60%		3.12%
Russell Top 50 ^® Mega Cap Index Total Return (reflects no deduction for fees, expenses or taxes)		15.66%		1.03%		4.09%

MANAGEMENT

INVESTMENT ADVISOR

Security Investors, LLC, which operates under the name Guggenheim Investments, serves as the investment adviser of the Fund.

PORTFOLIO MANAGERS

•

Michael P. Byrum, CFA, Senior Vice President of the Advisor. Mr. Byrum has been associated with the Advisor since it was founded in 1993.

•

James R. King, CFA, Portfolio Manager. With the exception of the period from March 15, 2008 to January 18, 2011, Mr. King has been associated with the Advisor since 1996.

•

Ryan A. Harder, CFA, Portfolio Manager. Mr. Harder has been associated with the Advisor since 2004.

PURCHASE AND SALE OF FUND SHARES

Shares may be purchased and redeemed from the Fund only in “Creation Units” of 50,000 shares, or multiples thereof. As a practical matter, only institutions and large investors, such as market makers or other large broker-dealers, purchase or redeem Creation Units. Most investors will buy and sell shares of the Fund on the Exchange. Individual shares can be bought and sold throughout the trading day like other publicly traded securities through a broker-dealer on the Exchange. These transactions do not involve the Fund. The price of an individual Fund share is based on market prices, which may be different from its NAV. As a result, the Fund’s shares may trade at a price greater than the NAV (at a premium) or less than the NAV (at a discount). Most investors will incur customary brokerage commissions and charges when buying or selling shares of the Fund through a broker-dealer on the Exchange.

TAX INFORMATION

Fund distributions are generally taxable as ordinary income or capital gains (or a combination of both), unless your investment is in an IRA or other tax-advantaged retirement account.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase Fund shares through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your sales person to recommend the Fund over another investment. Ask your sales person or visit your financial intermediary’s website for more information.