IFXY Infrax Systems Inc (PK)

CUSIP No.                             13G                      Page   of   Pages

78464A276
--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

Tortoise Investment Management, LLC
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                 (a)  |_|
                                                                 (b)  |_|
--------------------------------------------------------------------------------
3.   SEC USE ONLY


--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

New York
--------------------------------------------------------------------------------
  NUMBER OF    5.   SOLE VOTING POWER SHARES

0
--------------------------------------------------------------------------------
BENEFICIALLY   6.   SHARED VOTING POWER OWNED BY

0
--------------------------------------------------------------------------------
    EACH       7.   SOLE DISPOSITIVE POWER REPORTING

--------------------------------------------------------------------------------
   PERSON      8.   SHARED DISPOSITIVE POWER WITH

70,952
--------------------------------------------------------------------------------
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

70,952
--------------------------------------------------------------------------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

                                                                           |_|
--------------------------------------------------------------------------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

8.87% (based on 800,000 shares outstanding on February 12, 2014.

--------------------------------------------------------------------------------
12.  TYPE OF REPORTING PERSON*

IA
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

CUSIP No.  78464A276                  13G                      Page   of   Pages


Item 1(a).  Name of Issuer:

SPDR Nuveen Barclays Build America Bond ETF


Item 1(b).  Address of Issuer's Principal Executive Offices:

One Lincoln Street
Boston, MA 02111

Item 2(a).  Name of Person Filing:

Tortoise Investment Management, LLC

Item 2(b).  Address of Principal Business Office, or if None, Residence:

239 Central Avenue, 2nd Floor
White Plains, NY 10606


Item 2(c).  Citizenship: USA


Item 2(d).  Title of Class of Securities:

Common Stock


Item 2(e).  CUSIP Number: 78464A276


Item 3.     If This Statement  is Filed  Pursuant to  Rule 13d-1(b), or 13d-2(b)
            or (c), Check Whether the Person Filing is a:

      (a)   |_|   Broker or dealer registered under Section 15 of the Exchange
                  Act.

      (b)   |_|   Bank as defined in Section 3(a)(6) of the Exchange Act.

      (c)   |_|   Insurance company as defined in Section 3(a)(19) of the
                  Exchange Act.

      (d)   |_|   Investment company registered under Section 8 of the
                  Investment Company Act.

      (e)   |x|   An investment adviser in accordance with Rule
                  13d-1(b)(1)(ii)(E);

      (f)   |_|   An employee benefit plan or endowment fund in accordance with
                  Rule 13d-1(b)(1)(ii)(F);

      (g)   |_|   A parent holding company or control person in accordance with
                  Rule 13d-1(b)(1)(ii)(G);

      (h)   |_|   A savings association as defined in Section 3(b) of the
                  Federal Deposit Insurance Act;

      (i)   |_|   A church plan that is excluded from the definition of an
                  investment company under Section 3(c)(14) of the Investment
                  Company Act;

      (j)   |_|   Group, in accordance with Rule 13d-1(b)(1)(ii)(J).



CUSIP No.    78464A276               13G                      Page   of   Pages


Item 4.  Ownership.

     Provide  the  following  information  regarding  the  aggregate  number and
percentage of the class of securities of the issuer identified in Item 1.

     (a)  Amount beneficially owned: 70,952

     (b)  Percent of class:     8.87%

     (c)  Number of shares as to which such person has:

          (i)   Sole power to vote or to direct the vote 0

          (ii)  Shared power to vote or to direct the vote 0

          (iii) Sole power to dispose or to direct the disposition of 0

          (iv)  Shared power to dispose or to direct the disposition of  70,952


Item 5.  Ownership of Five Percent or Less of a Class.

     If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities check the following [  ].


Item 6.  Ownership of More Than Five Percent on Behalf of Another Person.

N/A

Item 7.  Identification and  Classification of the Subsidiary Which Acquired the
         Security  Being  Reported on by the Parent  Holding  Company or Control
         Person.

N/A


Item 8.  Identification  and  Classification  of Members of the Group.

N/A

Item 9.  Notice of Dissolution of Group.

N/A

Item 10.  Certifications.



          By signing  below I certify  that,  to the best of my  knowledge  and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and not held for
          the  purpose  of or with the effect of  changing  or  influencing  the
          control of the issuer of the  securities and were not acquired and are
          not held in  connection  with or as a participant  in any  transaction
          having such purpose or effect.



                                    SIGNATURE

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.


                                         February, 13, 2014
                                         ---------------------------------------
                                                         (Date)

                                         /s/ Ian Yankwitt
                                         ---------------------------------------
                                                       (Signature)


                                         Ian Yankwitt, President
                                         ---------------------------------------
                                                      (Name/Title)