Courtesy of Mike Martin.
The difference over time between the ETF for GLD and the Standard and Poors says
Assets under management, August 22, 2011…
Gold ETF: $77.5 billion (largest ETF in the world)
S&P 500 ETF: $76.5 billion
Assets under management, Today…
Gold ETF: $29.2 billion
S&P 500 ETF: $275 billion (largest ETF in the world)$GLD $SPY