Supplement to the currently effective  Statements of Additional  Information for
Fund listed below:

DWS Short Duration Plus Fund
--------------------------------------------------------------------------------


The following  information  supplements  the "Management of the Fund" section of
the Fund's current Statements of Additional Information:

Fund Ownership of Portfolio Managers:

The following table shows the dollar range of shares owned  beneficially  and of
record by each  member of the Fund's  portfolio  management  team in the Fund as
well as in all DWS Funds as a group (i.e.  those funds advised by Deutsche Asset
Management or its affiliates),  including  investments by their immediate family
members sharing the same household and amounts invested  through  retirement and
deferred compensation plans. This information is provided as of August 31, 2007.

<TABLE>
<CAPTION>

                                                  Dollar Range of              Dollar Range of DWS Fund Shares
Name of Portfolio Manager                        Fund Shares Owned                          Owned
-------------------------                        -----------------                          -----

<S>                                               <C>                                 <C>
Thomas Picciochi                                  $10,001-$50,000                     $100,001-$500,000
</TABLE>

Conflicts of Interest:

In addition to managing the assets of the Fund,  the Fund's  portfolio  managers
may have responsibility for managing other client accounts of the Advisor or its
affiliates.  The tables below show, for each portfolio  manager,  the number and
asset size of (1) SEC registered  investment companies (or series thereof) other
than the Fund, (2) pooled investment vehicles that are not registered investment
companies and (3) other  accounts  (e.g.,  accounts  managed for  individuals or
organizations)  managed by each  portfolio  manager.  The  tables  also show the
number of  performance  based fee  accounts,  as well as the total assets of the
accounts for which the advisory fee is based on the  performance of the account.
This information is provided as of August 31, 2007.

Other SEC Registered Investment Companies Managed:

<TABLE>
<CAPTION>

                             Number of
                            Registered       Total Assets of       Number of Investment        Total Assets of
Name of                     Investment          Registered         Company Accounts with    Performance-Based Fee
Portfolio Manager            Companies     Investment Companies    Performance-Based Fee           Accounts
-----------------            ---------     --------------------    ---------------------           --------

<S>                           <C>              <C>                           <C>                      <C>
Thomas Picciochi              11               $4,378,711,027                0                        $0

Other Pooled Investment Vehicles Managed:

                                                                     Number of Pooled
                              Number of                             Investment Vehicle
                               Pooled        Total Assets of           Accounts with           Total Assets of
Name of                      Investment     Pooled Investment          Performance-         Performance-Based Fee
Portfolio Manager             Vehicles           Vehicles                Based Fee                 Accounts
-----------------             --------           --------                ---------                 --------

Thomas Picciochi               5               $316,419,923                  2                   $257,589,097

Other Accounts Managed:
<PAGE>

                              Number of                          Number of Other Accounts      Total Assets of
Name of                         Other        Total Assets of      with Performance-Based    Performance-Based Fee
Portfolio Manager             Accounts        Other Accounts                Fee                    Accounts
-----------------             --------        --------------                ---                    --------

Thomas Picciochi                11             $792,449,550                  2                   $148,708,705
</TABLE>

In  addition  to the  accounts  above,  an  investment  professional  may manage
accounts in a personal  capacity that may include  holdings that are similar to,
or the same as,  those of the funds.  The  Advisor has in place a Code of Ethics
that is designed to address  conflicts of interest and that, among other things,
imposes  restrictions  on the ability of portfolio  managers  and other  "access
persons" to invest in securities  that may be recommended or traded in the funds
and other client accounts.

Real,  potential  or apparent  conflicts  of interest may arise when a portfolio
manager has day-to-day  portfolio  management  responsibilities  with respect to
more than one fund or account, including the following:

o        Certain  investments may be appropriate for the Fund and also for other
         clients advised by the Advisor, including other client accounts managed
         by the Fund's portfolio  management team.  Investment decisions for the
         Fund  and  other  clients  are  made  with a view  to  achieving  their
         respective  investment  objectives  and  after  consideration  of  such
         factors as their current holdings,  availability of cash for investment
         and the size of their investments  generally. A particular security may
         be bought or sold for only one client or in  different  amounts  and at
         different times for more than one but less than all clients.  Likewise,
         because   clients  of  the  Advisor  may  have   differing   investment
         strategies, a particular security may be bought for one or more clients
         when one or more other clients are selling the security. The investment
         results  achieved for the Fund may differ from the results achieved for
         other  clients of the Advisor.  In addition,  purchases or sales of the
         same  security  may be made for two or more clients on the same day. In
         such event,  such transactions will be allocated among the clients in a
         manner  believed by the Advisor to be most  equitable  to each  client,
         generally utilizing a pro rata allocation  methodology.  In some cases,
         the allocation  procedure could  potentially  have an adverse effect or
         positive  effect on the price or amount of the securities  purchased or
         sold by the Fund. Purchase and sale orders for the Fund may be combined
         with those of other clients of the Advisor in the interest of achieving
         the most favorable net results to the Fund and the other clients.

o        To the  extent  that  a  portfolio  manager  has  responsibilities  for
         managing  multiple client  accounts,  a portfolio  manager will need to
         divide time and attention among relevant accounts. The Advisor attempts
         to minimize these conflicts by aligning its portfolio  management teams
         by  investment  strategy and by  employing  similar  investment  models
         across multiple client accounts.

o        In some cases, an apparent  conflict may arise where the Advisor has an
         incentive, such as a performance-based fee, in managing one account and
         not with  respect to other  accounts it manages.  The Advisor  will not
         determine  allocations based on whether it receives a performance-based
         fee from the client. Additionally, the Advisor has in place supervisory
         oversight processes to periodically monitor performance  deviations for
         accounts with like strategies.

o        The Advisor and its  affiliates  and the  investment  team of the Funds
         manage other mutual funds and separate  accounts on a long-only  basis.
         The  simultaneous  management  of long  and  short  portfolios  creates
         potential  conflicts  of  interest  including  the risk that short sale
         activity  could   adversely   affect  the  market  value  of  the  long
         positions(and  vice versa),  the risk arising from sequential orders in
         long and short  positions,  and the  risks  associated  with  receiving
         opposing  orders at the same time.  The Advisor has adopted  procedures
         that it believes are reasonably  designed to mitigate  these  potential
         conflicts  of  interest.  Included  in these  procedures  are  specific
         guidelines  developed to ensure fair and  equitable  treatment  for all
         clients whose accounts are managed by each Fund's portfolio  management
         team. The Advisor and the portfolio  management  team have  established
         monitoring  procedures,  a protocol for supervisory reviews, as well as
<PAGE>

         compliance  oversight  to ensure that  potential  conflicts of interest
         relating to this type of activity are properly addressed.

The Advisor is owned by Deutsche Bank AG, a  multi-national  financial  services
company.  Therefore,  the Advisor is affiliated  with a variety of entities that
provide, and/or engage in commercial banking, insurance,  brokerage,  investment
banking,  financial  advisory,  broker-dealer  activities  (including  sales and
trading),  hedge funds, real estate and private equity investing, in addition to
the provision of investment  management services to institutional and individual
investors.  Since  Deutsche  Bank AG, its  affiliates,  directors,  officers and
employees (the "Firm") are engaged in businesses  and have interests  other than
managing  asset  management  accounts,   such  other  activities  involve  real,
potential or apparent  conflicts of interest.  These  interests  and  activities
include potential  advisory,  transactional  and financial  activities and other
interests  in  securities  and  companies  that may be  directly  or  indirectly
purchased  or sold by the Firm for its  clients'  advisory  accounts.  These are
considerations  of which  advisory  clients  should be aware and which may cause
conflicts that could be to the disadvantage of the Advisor's  advisory  clients.
The Advisor has  instituted  business and  compliance  policies,  procedures and
disclosures  that are  designed to identify,  monitor and mitigate  conflicts of
interest and, as appropriate, to report them to the Fund's Board.



               Please Retain This Supplement for Future Reference


November 2, 2007