PIONEER INDO-ASIA FUND
NSAR-B, 1999-12-27
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<PAGE>      PAGE  2
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<PAGE>      PAGE  3
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<PAGE>      PAGE  4
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SIGNATURE   ROBERT P. NAULT
TITLE       ASST. SECRETARY



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                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Board of Trustees of
Pioneer Indo-Asia Fund:

In planning and  performing  our audit of the  financial  statements  of Pioneer
Indo-Asia  Fund for the year ended October 31, 1999, we considered  its internal
control,  including control activities for safeguarding securities,  in order to
determine our auditing  procedures  for the purpose of expressing our opinion on
the financial  statements and to comply with the requirements of Form N-SAR, not
to provide assurance on internal control.

The management of Pioneer  Indo-Asia Fund is responsible  for  establishing  and
maintaining internal control. In fulfilling this  responsibility,  estimates and
judgments by management are required to assess the expected benefits and related
costs of controls.  Generally, controls that are relevant to an audit pertain to
the entity's objective of preparing  financial  statements for external purposes
that are fairly  presented in  conformity  with  generally  accepted  accounting
principles.   Those  controls   include  the   safeguarding  of  assets  against
unauthorized acquisition, use, or disposition.

Because of inherent  limitations in internal  control,  error or fraud may occur
and not be detected.  Also,  projection of any evaluation of internal control to
future periods is subject to the risk that it may become  inadequate  because of
changes in conditions or that the  effectiveness of the design and operation may
deteriorate.

Our consideration of internal control would not necessarily disclose all matters
in  internal   control  that  might  be  material   weaknesses  under  standards
established  by the  American  Institute  of  Certified  Public  Accountants.  A
material weakness is a condition in which the design or operation of one or more
of the internal control components does not reduce to a relatively low level the
risk  that  misstatements  caused  by error or fraud in  amounts  that  would be
material in relation to the financial statements being audited may occur and not
be  detected  within a timely  period  by  employees  in the  normal  course  of
performing  their assigned  functions.  However,  we noted no matters  involving
internal  control  and  its  operation,   including  controls  for  safeguarding
securities,  that we consider to be material  weaknesses  as defined above as of
October 31, 1999.

This report is intended solely for the  information  and use of management,  the
Board of Trustees of Pioneer  Indo-Asia  Fund,  and the  Securities and Exchange
Commission.


                                                            Arthur Andersen LLP

                                                            /s/ Arthur Andersen


Boston, Massachusetts
December 3, 1999





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