 Institutional investors were repelled by campaign against "blood diamonds", the monopoly structure of the diamond market and the lack of uniform standards for diamond pricing.In 2012 the SEC reviewed a proposal to create the "first diamond-backed exchange-traded fund" that would trade on-line in units of one-carat diamonds with a storage vault and delivery point in Antwerp, home of the Antwerp Diamond Bourse.The exchange fund was backed by a company based in New York City called IndexIQ.