NEW YORK ( TheStreet) -- Here are this week's winners and losers.
ETFS Physical Platinum Shares ( PPLT) -4.2% Although many corners of the precious metals spectrum ran into hurdles this week, platinum led the decline. This industry-linked metal tends to trade in line with the broader markets and has struggled as global economic headwinds weigh on investor confidence. Looking to the week ahead, platinum and its cousin, palladium, may fall into focus when auto and truck sales numbers are released. Both are used extensively in the production of catalytic converters. iPath S&P 500 VIX Short Term Futures ETN ( VXX) -2.8% Friday's choppy action helped VXX recover some lost ground but it was not enough to keep the ETN from scoring a spot amongst this week's biggest losers. This is a notable reversal from the previous week when VXX managed to top the winners list. VXX's inherent volatility has shone brightly over the past two weeks. While exciting to watch from day to day, investors looking to construct a stable, long-term portfolio should steer clear of this product. Written by Don Dion in Williamstown, Mass.