* Latest Macro fund to feel pinch of low market volatility (Adds detail from statement, quotes, bullet points, background): * Latest Macro fund to feel pinch of low market volatility (Adds detail from statement, quotes, bullet points, background) LONDON, May 2 (Reuters) - One of Sweden’s oldest hedge funds, Nektar Asset Management, is to close after its biggest investor Brummer & Partners said on Thursday it planned to withdraw its entire investment after a disappointing performance in recent years.