The Guardians of New Zealand Superannuation, the manager of the NZ superannuation Fund, said it had terminated AMP Capital's New Zealand active equities mandate, effective from last Thursday.
The value of the mandate was NZ$257.5 million. AMP Capital was appointed to the mandate in 2003.
"The decision does not affect the Fund's 5 per cent allocation to New Zealand equities," the Guardians of NZ said in a statement.
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Superfund spokeswoman, Catherine Etheredge, declined to comment on the reasons for the move.