CEO and chief investment officer for U.S. Global Investors, Frank Holems, wrote an article for business insider that shows how September has been the best performing month of the year for gold since 1969. He outlines some of the main drivers for this, one being that retailers are getting ready for the holiday season by stocking up on inventory, including gold jewelry.

Holems also details the inverse relationship between gold and stocks. September tends to be the worst month for stocks.

It’s a good read for anyone who buys and sells gold. Check it out here.