Hedge fund, Vector Commodity Management, has been closed to new investors after acquiring $600 million in assets, Bloomberg reports. The fund, which had returned 16% in the first four months of 2011, has stopped taking investor money. Vector invests in relative-value strategies that seek to profit on prices caps between contracts, such as different oil products. The fund is managed by former Goldman Sachs trader, Gilbert Saiz.

Click here for the story from Bloomberg.