Popular ETFsSPY – SPDR S&P 500 ETFVOO – Vanguard S&P 500 ETFQQQ – PowerShares QQQ ETFGLD – SPDR Gold Shares ETFEEM – iShares MSCI Emerging Markets ETFIEMG – iShares Core MSCI Emerging Markets ETFVTI – Vanguard Total Stock Market ETFIVV – iShares Core S&P 500 ETFVEA – Vanguard FTSE Developed Markets ETFEEM – iShares MSCI Emerging Markets ETFGDX – VanEck Vectors Gold Miners ETFEFA – iShares MSCI EAFE ETFXLF – Financial Select Sector SPDR Fund