单选题 An analyst does research about commodity investing. The analyst stated that returns from commodities usually have a negative correlation with inflation and with returns from traditional stocks and fixed income investments. Is the analyst correct with respect to the correlation of returns from commodities with:

【正确答案】 B

【答案解析】[解析] 商品投资收益率通常与通货膨胀率成正比，而与传统股票和债券投资收益率成比较低的正比，或者是反比关系。