The current year is proving to be an annus mirabilis for gold investors, with the yellow metal running riot. Gold prices are currently trading at $1,933 per ounce, not far from their historical high of $2,075 that they reached a month ago. That is good for a 26.5% gain year-to-date and 30.9% since their 52-week low in March, compared to a 6.3% YTD gain by the S&P 500. The torrid rally represents the sharpest gain the metal has mustered in more than a decade. That is hardly surprising given gold’s traditional role as a safe haven asset…