• IShares Gold Trust average operating margin for 2012 was 746.85%, a 37.39% decline from 2011.
• IShares Gold Trust average operating margin for 2011 was 1192.83%, a 109.25% decline from 2010.
• IShares Gold Trust average operating margin for 2010 was 570.04%, a 14.49% increase from 2009.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.