Referring to the daily-return graphs for the SPDR S&P 500 ETF Trust (SPY) and the Direxion Daily Junior Gold Miners Index Bull 2X Shares (JNUG) given below: 10 10-1 SPY 10 Empirical Gaussian 10-1 JNUG Empirical Gaussian ^ ^ 10-2 10-3 10-3 1014 -15 10-* -10 10