At a time when World Federation of Diamond Bourse president Avi Paz, appealed to diamond mining companies to reduce their supply of roughs, Diamond Trading Company (DTC) has notified its sightholders through a letter, that it would reduce its remaining two sights of the calendar year. As reported by Rapaport, DTC is planning to launch its marketing programme in the next sight, which will promote diamonds as a form a investment.Avi Paz had requested the reduction of rough supplies in the market in order to withstand the current economic crisis.