Morgan, Lewis & Bockius LLP
1111 Pennsylvania Avenue, NW
Washington, DC 20004



LAURA E. FLORES
202.739.5684
lflores@morganlewis.com



December 5, 2006



VIA EDGAR CORRESPONDENCE

Mr. Christian T. Sandoe
U.S. Securities and Exchange Commission
100 F Street, NE
Washington, DC  20549

Re:      RYDEX ETF TRUST (THE "TRUST") - POST EFFECTIVE AMENDMENT NO. 7
         --------------------------------------------------------------
         (FILE NOS. 333-101625 AND 811-21261)
         ------------------------------------

Dear Mr. Sandoe:

This letter  responds to your comments to the Trust's  Post-Effective  Amendment
No. 7, filed on August 18,  2006 for the  purpose of  introducing  the Rydex S&P
Equal Weight Consumer Discretionary ETF, Rydex S&P Equal Weight Consumer Staples
ETF, Rydex S&P Equal Weight Energy ETF, Rydex S&P Equal Weight  Financials  ETF,
Rydex S&P Equal Weight Health Care ETF, Rydex S&P Equal Weight  Industrials ETF,
Rydex S&P Equal Weight Materials ETF, Rydex S&P Equal Weight Technology ETF, and
Rydex S&P Equal Weight Utilities ETF (each a "Fund" and  collectively,  the "S&P
Equal Weight Sector ETF Series") into the Trust.  The following  summarizes your
comments,   and  our  response  to  those  comments.   Unless  otherwise  noted,
capitalized  terms have the same meaning as  contained in the Funds'  Prospectus
and/or Statement of Additional Information ("SAI").

COMMENTS APPLICABLE TO THE PROSPECTUS:
- --------------------------------------

1.       COMMENT.  Please  consolidate the "Principal  Risks" disclosure in each
         Fund's two-page spread.

         RESPONSE.  We have not consolidated the "Principal Risks" disclosure in
         each Fund's two-page spread because we do not think Form N-1A precludes
         the  collection of common risk return  information  in the forefront of
         the  Prospectus  followed  by each  Fund's  specific  Item 2 and Item 3
         information.  Form N-1A states only that this  information is not to be
         preceded  by "any other Item  except the Cover Page (Item 1) or a




         table of contents  meeting the  requirements  of rule 481(c)  under the
         Securities  Act." In  compliance  with this  requirement,  the  "Common
         Risk/Return  Information" section of the Prospectus is preceded only by
         the Cover Page and Table of Contents of the Prospectus.

         In addition,  the Prospectus's  current organization is consistent with
         the  requirements  set forth in Rule 421 under  the  Securities  Act of
         1933. In particular,  Rule 421(b)(4)4 states that repeating  disclosure
         "in different  sections of the document that  increases the size of the
         document but does not enhance the quality of the information" should be
         avoided.  Repeating the principal  risks  associated  with each Fund in
         each  Fund's  two-page  spread will not only  increase  the size of the
         Prospectus  significantly,  but will have the effect of obscuring those
         risks that are not common to all of the Funds.

         Moreover,  we think that the Prospectus's current organization aids the
         investor in  understanding  of the principal risks associated with each
         Fund. By presenting the principal risks that are common to each Fund in
         one  location  in the  front of the  Prospectus  and the  Fund-specific
         principal risks in each Fund's two-page spread,  the investor is better
         able to compare the Funds and focus on those risks that are specific to
         each Fund.


2.       COMMENT.  Under the Rydex S&P Equal Weight Industrials ETF's "Principal
         Investment  Strategy,"  please  explain why the inclusion of commercial
         services and supplies companies is consistent with the other components
         of the S&P Equal Weight Index Industrials. In addition, please identify
         which industry's conglomerates the Fund intends to invest in.


         RESPONSE.  The  component  companies  of the  Index are  determined  in
         accordance   with   the   Global   Industry   Classification   Standard
         ("GICS(R)").  The  GICS  Industrial  Sector  includes  companies  whose
         businesses  are  dominated by  activities  including  the  provision of
         commercial  services  and  supplies,  including  printing,  employment,
         environmental and office services.

         The Fund may invest in the conglomerates of any industry represented in
         the  Industrial  Conglomerates  sub-industry  of  the  GICS  Industrial
         Sector.  However,  we have revised the second sentence under "Principal
         Investment Strategy" to make it more consistent with the description of
         the GICS Industrial Sector as follows (new language appears in bold for
         purposes of correspondence only):

         "The Index consists of the common stocks of COMPANIES WHOSE  BUSINESSES
         ARE DOMINATED BY ONE OF THE FOLLOWING  ACTIVITIES:  THE MANUFACTURE AND
         DISTRIBUTION  OF  CAPITAL  GOODS,   INCLUDING  AEROSPACE  AND  DEFENSE,
         CONSTRUCTION,  ENGINEERING AND BUILDING PRODUCTS,  ELECTRICAL EQUIPMENT
         AND INDUSTRIAL  MACHINERY;  OR THE PROVISION OF COMMERCIAL SERVICES AND
         SUPPLIES  AND  TRANSPORTATION  SERVICES,   INCLUDING  air  freight  and
         logistics,   airlines,   and  marine,   road  and  rail  transportation
         infrastructure."

3.       COMMENT.  Please  revise  the  information   under  "Underlying  Index
         Information,"  so that it is  consistent  with  the  index  information
         provided in the SAI.





         RESPONSE. We have  revised the  information  under  "Underlying  Index
         Information" accordingly.


COMMENTS APPLICABLE TO THE SAI:
- -------------------------------

4.       COMMENT.  Under "Fundamental  Policies of the Funds," please revise the
         Funds' eighth fundamental policy to remove the reference to "sector" in
         the first sentence.

         RESPONSE.   We  have  revised  the  Funds'  eighth  fundamental  policy
         accordingly.

                                       ***

I hereby  acknowledge  on behalf of the Rydex ETF Trust (the "Trust")  that: (i)
the Trust is responsible  for the adequacy and accuracy of the disclosure in its
registration  statement;  (ii) SEC staff  comments or changes to  disclosure  in
response to staff comments in the registration  statement  reviewed by the staff
do not foreclose the SEC from taking any action with respect to the registration
statement; and (iii) the Trust may not assert SEC staff comments as a defense in
any proceeding  initiated by the SEC or any person under the federal  securities
laws of the United States.

If you have any  additional  questions  or  comments,  please do not hesitate to
contact either John McGuire at 202.739.5654 or me at 202.739.5684.


Sincerely,



Laura E. Flores

c:  John McGuire, Esq.
    Joanna Haigney