Exchange traded funds (ETFs) that invest in precious metals were set to open sharply higher Monday as silver prices jumped more than 6% to almost $50 an ounce.

Silver was trading near levels not seen since 1980 when the Hunt brothers tried to corner the market.

“Everyone is buying,” a Hong Kong-based dealer told Reuters. “There is stop-loss buying, as well as a good buying interest from China.”

Holdings in the largest silver ETF, iShares Silver Trust (NYSEArca: SLV), have risen 2.4% so far this year, according to the report. The silver ETF has about $16.6 billion in assets and roughly 358.5 million ounces of silver, according to manager BlackRock.

Gold futures, meanwhile, were up nearly 1% Monday morning to a new record high.