I entered GLD on this chart, In “Compare window, I added SLV AG CDE AGI. Results? GLD + 19.92% SLV + 20.07%, AG + 106% AGI + 146% CDE + 193%. You need to scroll sideways to get back to late ’15 early ’16.
http://www.google.com/finance?q=gld&ei=8dONWfjvIZTSjAHZl6SIDg