Gold continues to show off its luster - hovering at record high prices nearing $1,150 an ounce today.

At the same time, investor appetite for gold only continues to rise. But thanks to an exchange-traded fund (ETF) breakthrough five years ago today, access to commodity investing has never been easier for individual investors.

Five years ago, the SPDR Gold Shares ETF (GLD) revolutionalized commodities investing, which typically had been reserved for professional traders with futures contract accounts. However, with this new ETF, investing in gold became as easy as buying ordinary stocks. Individuals could now invest in gold by buying GLD shares using a stock broker or through a simple electronic brokerage account used for stock trading.

Designed to track gold prices and backed by gold bullion itself (gold bars stored in vaults), the innovative GLD became the first commodities ETF on the U.S. market. Since then, other commodity-backed ETFs have come to the marketplace, tracking various energy (crude oil, natural gas), metal (silver, aluminum, copper), and even agriculture (sugar, coffee, corn) prices.

Looking back, the timing of the GLD’s launch seems perfect. Gold prices have surged over 150% in just five years.

Gold Prices Then & Now

                  2004                 Today

Per Ounce    $443                 $1,146