Bloomberg reports here:
Unusual trading patterns around 3 p.m. in London, when the so-called afternoon fix is set on a private conference call between five of the biggest gold dealers, are a sign of collusive behavior and should be investigated, New York University’s Stern School of Business Professor Rosa Abrantes-Metz and Albert Metz, a managing director at Moody’s Investors Service, wrote in a draft research paper. “The structure of the benchmark is certainly conducive to collusion and manipulation, and the empirical data are consistent with price artificiality,” they say in the report, which hasn’t yet been submitted for publication. “It is likely that co-operation between participants may be occurring.” ... Abrantes-Metz advises the European Union and the International Organization of Securities Commissions on financial benchmarks. Her 2008 paper “Libor Manipulation?” helped uncover the rigging of the London interbank offered rate, which has led financial firms including Barclays Plc (BARC) and UBS AG to be fined about $6 billion in total. She is a paid expert witness to lawyers, providing economic analysis for litigation. [Albert] Metz heads credit policy research at ratings company Moody’s.