Rapaport News reports that, "Polished diamond market sentiment improved in December as shortages supported prices and dealers filled last-minute holiday orders. Initial reports about U.S. holiday season jewelry sales are positive." They also note that uncertainty about post-Christmas demand in the US and Chinese New Year sales has resulted in limited dealer and retailer inventory buying. Most importantly - though perhaps too early to know if it is sustainable - polished prices finally saw an uptick in December. "The RapNet Diamond Index (RAPI) for 1-carat, GIA-graded diamonds rose 1.5% in December. RAPI for 0.30-carat diamonds advanced 4.7% and RAPI for 0.50-carat diamonds grew 3%. RAPI for 3-carat diamonds fell 0.1%." IDEX Online also noted a slight polished diamond price increase in December.
"For the full year 2015," writes Rapaport, RAPI for 1-carat diamonds declined 5.8%. RAPI for 0.30-carat diamonds dropped 13.4%, while RAPI for 0.50-carat diamonds slumped 14.5%. RAPI for 3-carat diamonds fell 14.5% in 2015." The polishedprices index backed up these yearly figures with slight variations.