NEW YORK ( TheStreet) -- Welcome to Don Dion's "Daily ETF Winners and Losers." Be sure to stop by each day to find out which ETFs are gaining or losing.
Gold is glittering so far in 2016, up over 17%, but that's still dull in comparison to the 103% return for one precious metals ETF.
In trading on Wednesday, shares of the Lithium ETF entered into oversold territory, changing hands as low as $11.25 per share. We define oversold territory using the Relative Strength Index, or RSI, which is a technical analysis indicator used to measure momentum on a scale of zero to 100.
Here's why it's important to look under the hood of narrowly focused exchange-traded funds.