While many pundits are saying that the recent market turnaround won’t last, Neil Hennessy, chief investment officer of Hennessey Funds, says they’re wrong. In an interview with Yahoo! TechTicker, Hennessy says he thinks we are at the start of a 10-year bull market, and that the Dow Jones Industrial Average will double by the time it’s done. A couple key reasons he cites: low interest rates that make stocks far more attractive than government bonds, and large amounts of cash waiting on the sidelines.