研客专栏 | 石油、棉花、铜等27种大宗商品55年的价格波动周期

Core Viewpoint - The World Bank's report on commodity cycles post-COVID-19 indicates a significant shift in the frequency and volatility of commodity price cycles, suggesting a new era in commodity market dynamics [1][42]. Group 1: Commodity Price Cycles - Over the past 55 years, 27 types of commodities have experienced an average of 14 turning points, approximately every four years [37]. - The average duration of booms is 38 months, while recessions last an average of 52 months, indicating that recessions tend to last longer than booms [29][37]. - The average amplitude of price changes during booms and recessions is roughly similar, suggesting symmetrical price volatility [29][37]. Group 2: Historical Price Fluctuations - The study identifies three distinct periods of commodity price fluctuations: 1970-1985, 1986-2001, and 2002-2024, each characterized by different dynamics and influencing factors [8][12][41]. - The first period (1970-1985) was marked by significant volatility due to supply shocks, particularly in the energy market, with an average boom duration of 31 months and a longer recession period [8][12]. - The second period (1986-2001) exhibited more stability, with longer average durations for both booms (47 months) and recessions (56 months), attributed to technological advancements and market liberalization [12][41]. - The third period (2002 onwards) saw a resurgence in volatility driven by demand shocks from emerging markets, with shorter average durations for both booms (35 months) and recessions (46 months) [13][41]. Group 3: Post-Pandemic Commodity Behavior - Since 2020, the average duration of boom phases has decreased to 24 months, and recession durations have halved to 23 months, indicating a significant compression of the commodity cycle [16][42]. - The amplitude of price increases during booms has intensified, averaging 113%, while the severity of price declines during recessions has decreased to 79% [17][42]. - Various factors, including macroeconomic shocks, geopolitical tensions, and climate-related disruptions, have contributed to the observed deviations from historical commodity price patterns [17][19][42]. Group 4: Long-Term Trends and Structural Changes - The global energy transition is driving sustained demand for key minerals like lithium, copper, and nickel, exerting upward pressure on their prices [19][20]. - Increasingly frequent extreme weather events are heightening supply risks, particularly for agricultural commodities, which remain highly sensitive to climate conditions [19][20]. - The slowdown of global integration has led to increased geopolitical fragmentation, marked by trade barriers and sanctions, which disrupt commodity markets and contribute to price volatility [20][42].