<p><span class="articleLocation">SYDNEY</span>&nbsp;Australian pension funds are luring dozens of portfolio managers to work in-house to boost returns in a cut-throat investment environment, a move that could see external fund managers lose A$230 million ($172 million) in annual fees.</p> <p>Two of Australia&#39;s largest pension funds, AustralianSuper and Cbus, intend to manage in-house at least 20 percent of their combined A$140 billion in assets within the next decade.</p>