As filed with the Securities and Exchange Commission on January 24, 2013

File No. 333-31247
811-09170


SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

POST EFFECTIVE AMENDMENT NO. 18
TO
Form S-6
FOR REGISTRATION UNDER THE SECURITIES ACT OF 1933 OF
SECURITIES OF UNIT INVESTMENT TRUSTS REGISTERED
ON FORM N-8B-2

A.
Exact name of Trust:
 
SPDR DOW JONES INDUSTRIAL AVERAGE ETF TRUST
 
(formerly known as DIAMONDS TRUST SERIES 1 prior to February 26, 2010)
B.
Name of Depositor:
 
PDR SERVICES LLC
C.
Complete address of Depositor's principal executive office:
 
PDR SERVICES LLC
 
c/o NYSE Euronext
 
11 Wall Street
 
New York, New York 10005
D.
Name and complete address of agent for service:
 
Marija Willen, Esq.
 
PDR SERVICES LLC
 
c/o NYSE Euronext
 
11 Wall Street
 
New York, New York 10005
 
Copy to:
 
Nora M. Jordan, Esq.
 
Davis Polk & Wardwell LLP
 
450 Lexington Avenue
 
New York, New York 10017
   
 
It is proposed that this filing will become effective:
 
[X] on February 21, 2013 pursuant to paragraph (b) of Rule 485.
 
If appropriate, check the following box:
 
[X] this post-effective amendment designates a new effective date for a previously filed post-effective amendment.
   
E.
Title of securities being registered:
 
An indefinite number of Units pursuant to Rule 24f-2 under the Investment Company Act of 1940.
F.
Approximate date of proposed public offering:
 
AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE REGISTRATION STATEMENT.
 
o    Check box if it is proposed that this filing will become effective on [date] at [time] pursuant to Rule 487.


 
 
 
Post-Effective Amendment No. 16 was initially scheduled to become effective on December 30, 2012 and subsequently extended to January 25, 2013, pursuant to the filing of Post-Effective Amendment No. 17.  This amendment is being filed pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933 for the sole purpose of delaying the effectiveness of the above-referenced amendment until February 21, 2013.  The contents of the registrant's Post-Effective Amendment No. 16 under the Securities Act of 1933, filed on October 31, 2012, are incorporated by reference herein.



 
 
 
 
SIGNATURES
 

Pursuant to the requirements of the Securities Act of 1933, the registrant, SPDR Dow Jones Industrial Average ETF Trust, certifies that it meets all the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933, as amended, and has duly caused this amendment to the Registration Statement to be signed on its behalf by the undersigned thereunto duly authorized, in the City of New York, and State of New York, on the 24th day of January, 2013.

 
SPDR DOW JONES INDUSTRIAL AVERAGE ETF TRUST
  
 
(Registrant)
  
       
 
By:
PDR Services LLC
  
       
 
By:
/s/ Joseph Mecane
  
   
Name: Joseph Mecane
  
   
Title: President
  

Pursuant to the requirements of the Securities Act of 1933, this amendment to the Registration Statement has been signed below on behalf of PDR Services LLC, the Depositor, by the following persons in the capacities and on the date indicated.

PDR SERVICES LLC

Name
  
Title/Office
Date
/s/ Joseph Mecane 
  
President of PDR Services LLC*
January 24, 2013
Joseph Mecane
      
       
/s/ Laura Morrison 
  
Senior Vice President of PDR Services LLC
January 24, 2013
Laura Morrison
      
____________

*
The President of PDR Services LLC also undertakes all the duties and responsibilities of, and performs all functions of, the principal financial officer of PDR Services LLC.