(CNBC) Bridgewater, the world’s largest hedge fund, posted returns for 2018 that not only outperformed benchmark indexes for various asset classes, but also many of its peers. The firm’s flagship Pure Alpha fund finished the year returning 14.6 percent net of fees, a person with knowledge of the matter said. A hedge fund index weighted based average performance lost 2 percent in the year through November, according to Hedge Fund Research, which compiles the index. Full-year numbers from HFR are expected out this week.