Exchange-traded funds that track gold have surged in popularity. What should you know before you invest? Today's Stocks & Topics: Marijuana Stocks, CSCO - Cisco Systems Inc., Car Breakdowns Hit Record High, Retirement Age, NDAQ - Nasdaq Inc., DEO - Diageo PLC ADR, Roth IRA vs. 529 Plan, QCOM - Qualcomm Inc., TCP - TC PipeLines L.P., WPZ - Williams Partners L.P., ORCL - Oracle Corp.
