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

Oct 31, 2008

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:

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10 day
weighted
average
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
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October November
31, 2008 2.45490 $0.24 $16.6359 0.03542 17, 2008 2.49032

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(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
ratio.
>>

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 www.computershare.com.

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ARC RESOURCES LTD.
John P. Dielwart,
President and Chief Executive Officer
>>

%SEDAR: 00001245E %CIK: 0001029509

For further information: about ARC Energy Trust, please visit our website www.arcenergytrust.com or contact: Investor Relations, E-mail: ir@arcresources.com, 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