Common factors of commodity prices
从燃料和非燃料大宗商品价格中提取潜在因子，发现一个全球因子能解释大部分价格波动，且自2000年代初以来其重要性增加。
Summary In this paper, we extract latent factors from a large cross‐section of commodity prices, including fuel and non‐fuel commodities. We decompose each commodity price series into a global (or common) component, block‐specific components, and a purely idiosyncratic component. We find that the bulk of the fluctuations in commodity prices are well summarized by a single global factor. This global factor is closely related to fluctuations in global economic activity and, since the early 2000s, has become more important in explaining variations in commodity prices.