GDX (Gold Miners Index)

The GDX, or Gold Miners Index, is an exchange-traded fund (ETF) that tracks the performance of companies involved in gold mining. When investors buy shares in GDX, they essentially invest in a collection of gold mining companies. The value of GDX typically rises when gold prices increase, as higher gold prices can lead to better profits for these companies. It's a way for investors to gain exposure to the gold mining sector without having to buy individual stocks, providing both potential profit and risk associated with fluctuations in gold prices.