The chief quantitative strategist for AXA Investment Managers' equities business has jumped to a $46 billion superannuation fund. : The chief quantitative strategist for AXA Investment Managers' equities business has jumped to a $46 billion superannuation fund. HESTA has appointed Michael Kollo as its general manager quantitative solutions and risk, effective July 30. He was the chief quant strategist and deputy head of research at Rosenberg Equities, AXA Investment Managers' equities business. HESTA's appointment of Kollo builds on the fund's internal investment capability, chief investment officer Sonya Sawtell-Rickson said.