Commodities are finally doing what they are supposed to do. Going up, yes, but more importantly, behaving unpredictably. Besides China’s growth, commodities’ popularity has owed much to the idea that their prices often move on random, unconnected events—war, for example—rather than just, say, economic forecasts. So, in theory, they help diversify a portfolio, enhancing risk-adjusted returns.
Prior to 2009, the Dow Jones-UBS Commodity Index’s 90-day correlation with the S&P 500 swung roughly between 0.2 and negative 0.2, close to zero and indicating no relationship. A score of one denotes lock-step correlation, negative one perfect inverse correlation………………………….Full Article: Source