Public research brief
A compact description of the market can be useful even when the strongest claim in the title remains unsettled.
Igor Halperin represents a stock universe using a correlation-distance matrix and two transition matrices describing changes in return and volatility ranks. The portfolio combines a momentum long-short sleeve with a varying long-only allocation.
The paper reports outperformance on two test periods. Our interest is in the representation, the trading restraint it encourages, and the controls needed to tell a new forecasting benefit from familiar exposures.
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