Abstract
This study investigates the multifractality behavior, time-varying efficiency, and long memory in leading precious and industrial metals futures markets. We use Hurst exponent and an asymmetric multifractal detrended fluctuations analysis (A-MF-DFA). We show significant asymmetric multifractality. Moreover, gold has the lowest asymmetric multifractality behavior and silver experiences the highest magnitude of asymmetric multifractality. All metals markets show persistence under negative scales and anti-persistence at positive scales. Precious metals are more inefficient in a downward trend before and during the 2008 global financial crisis and European sovereign debt crisis (GFC and ESDC) and during the oil crisis. Industrial metals are highly inefficient in a downward trend before and during the GFC and ESDC and the recovery period, while the resuxlts are mixed during the oil crisis.
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