Investors are seeking to guard the money they’ve put into bullion and gold miners after significant gains this year, according to Barron’s.

“The yellow metal is up 26 percent in 2016 and gold miners, which tend to rise faster in good times and fall harder in bad, have more than doubled,” the financial weekly says. “Now some investors have begun positioning for the miners to tumble.”

Investors this month have bought thousands of puts, an options contract that allows a trader to sell an asset at a pre-set price, to protect themselves from declines in gold miner stocks. Of course, any trader selling the put contracts in the VanEck Vectors Gold Miners fund would benefit if gold miners kept on rising.

“The large trading sizes indicate that investors with major gold positions are securing their gains even though the forces pushing gold higher — including a strong U.S. dollar and easy money worldwide — remains intact,” Barron’s said. “The defensive posturing likely reflects the fact that all trades eventually stall, or run out of new money needed to keep pushing prices higher."