In trading on Wednesday, the Silver Miners ETF is outperforming other ETFs, up about 4% on the day. Components of that ETF showing particular strength include shares of Bear Creek Mining, up about 6.6% and shares of Endeavour Silver, up about 4.1% on the day.

And underperforming other ETFs today is the Invesco DWA Healthcare Momentum ETF, off about 1.7% in Wednesday afternoon trading. Among components of that ETF with the weakest showing on Wednesday were shares of Novavax, lower by about 17%, and shares of Sorrento Therapeutics, lower by about 15.9% on the day.

For MarketNewsVideo.com, I'm Sayoko Murase.