Silver retreated from a seven-week high Tuesday as investors took profits before a key US inflation report, Consumer Price Index, trimming a rally that has lifted the metal about 12% in little more than a week. Pan American Silver (TSX: PAAS; NYSE: PAAS) and First Majestic Silver (NYSE: AG) have posted strong gains over the past month as investors position for further strength in the metal. Its March 31 portfolio disclosure included stakes in several silver-focused explorers and developers, including Silver Bow Mining, Eloro Resources, Alaska Silver and Kuya Silver.