MLC has adjusted the weightings in its multi-manager global share strategies, reducing the allocation to two managers, while increasing allocations to five managers.
Under the new allocations, the exposure to Tweedy, Browne has increased to 13.5 per cent from 12.5 per cent.
Walter Scott will manage 14 per cent, compared to 12.5 per cent previously, and Sands Capital has moved to 13 per cent from 12.5 per cent.
Harding Loevner went from 12.5 per cent to 14 per cent, while Mondrian moved from 12.5 per cent to 13 per cent.
The increases in allocations came at the expense of Dimensional, which dropped to 9 per cent from 12.5 per cent, and Capital International, which decreased to 10.5 per cent from 12.5 per cent.
The allocation to Carnegie remained unchanged at 12.5 per cent.
"The new weightings are a reflection of our strong conviction in the ability of the managers in our line-up to continue to deliver superior relative returns," the National Australia Bank wealth management arm said.
But the recent volatility had created opportunities for adjustment, it said.
"At MLC, we constantly monitor how our portfolios perform in all market cycles, but are especially on the lookout for opportunities during times of heightened volatility.
"In our view, going forward it is no longer prudent to have an equal allocation across the eight managers."
The move away from equal weightings comes after Jonathan Armitage took over as global equities portfolio manager on 1 August.
Armitage joined from Schroders in the United Kingdom, where he was global portfolio manager and head of United States equities.
He took over from MLC global equities portfolio manager Paul Duncan, who resigned in September 2010 after 10 years with MLC.
Following Duncan's departure, MLC global shares senior analyst Myooran Mahalingam took over management until a replacement was found.
The changes affect the MLC Global Share Fund, MLC Hedged Global Share Fund and the global share strategies within the MLC Horizon Portfolios and MLC Long-Term Absolute Portfolio.
