The most common explanation is the global economic slowdown, which has diminished demand for energy, minerals, and agricultural products. Indeed, growth has slowed and GDP forecasts have been revised downward since mid-year in most countries.
最普遍的解释是全球经济减速导致对能源、矿产和农产品需求下降。事实上，自年中以来，大部分国家的增长都出现了减速，GDP预测也纷纷做出了向下修正。