ARC Resources Ltd./ARC Energy Trust Announce the October 2008 increase to the ARX Exchangeable Shares Exchange Ratio

    CALGARY, Oct. 31 /CNW/ - (AET.UN and ARX - TSX) ARC Resources Ltd. along
with ARC Energy Trust announces the increase to the exchange ratio of the
exchangeable shares of the corporation from 2.45490 to 2.49032. Such increase
will be effective on November 17, 2008.

    The following are the details on the calculation of the exchange ratio:


                                     10 day
                                    trading              Effective
    Record                 ARC       price                date of
    date of              Energy    of AET.UN                the      Exchange
    ARC Energy            Trust   (prior to    Increase   increase    ratio
    Trust       Opening  distrib-   the end       in         in       as of
    distrib-   exchange   ution      of the    exchange   exchange  effective
    ution        ratio   per unit    month)    ratio(xx)    ratio      date

    October                                               November
    31, 2008    2.45490   $0.24     $16.6359    0.03542   17, 2008   2.49032


    (xx) The increase in the exchange ratio is calculated by dividing the ARC
         Energy Trust distribution per unit by the 10 day weighted average
         trading price of AET.UN and multiplying by the opening exchange

    A holder of ARC Resources Ltd. exchangeable shares can exchange all or a
portion of their holdings at any time by giving notice to their investment
advisor or Computershare Investor Services at its principal transfer office in
Suite 600, 530 - 8th Avenue SW, Calgary, Alberta, T2P 3S8, their telephone
number is 1-800-564-6253 and their website is

    ARC RE

SOURCES LTD. John P. Dielwart, President and Chief Executive Officer %SEDAR: 00001245E %CIK: 0001029509

For further information:

For further information: about ARC Energy Trust, please visit our
website or contact: Investor Relations, E-mail:, Telephone: (403) 503-8600, Fax: (403) 509-6417, Toll Free
1-888-272-4900, ARC Resources Ltd., 2100, 440 - 2nd Avenue S.W., Calgary, AB,
T2P 5E9

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