The crippling fear that had plagued the global market during most of November appears to have fallen by the wayside as investors gear up for the final weeks of 2011. As I explained earlier this week, while the recent bout of upward action may be encouraging, it is important to keep a level head in this volatile environment. It is still young, but the PowerShares S&P 500 Low Volatility Portfolio has already shown during its short lifetime that it is well-equipped to weather the challenges of a choppy market. Keep this fund on the radar. Looking ahead, it stands a strong chance of becoming a mainstay within the ETF universe. Written by Don Dion in Williamstown, Mass.