Strategic and Tactical Roles of Enhanced Commodity Indices
比较了传统商品指数与利用合约到期日、动量及期限结构信号的增强型指数，发现增强型指数在战术资产配置中表现更优，年化超额收益最高达5.49%，同时保持与传统指数相当的风险分散和通胀对冲能力。
This article formally compares two traditional long‐only commodity indices, Standard & Poor's Goldman Sachs Commodity Index (S&P‐GSCI) and Dow Jones‐UBS Commodity Index (DJ‐UBSCI), with their enhanced versions that exploit signals based on contract maturity, momentum, and term structure. The enhanced indices are found to be useful for tactical asset allocation. With alphas ranging from 2.77% to 5.49% per annum, the maturity‐enhanced indices offer the best abnormal performance after accounting for liquidity risk. Momentum and term structure enhancements also earn a positive, albeit smaller, alpha of 2.10% per annum on average. All the enhanced indices are found to have comparable effectiveness for risk diversification and inflation hedging as their traditional counterparts, making them useful for strategic asset allocation.