GAZ was hit especially hard this week due to the premium it has developed. Increased demand for this fund has caused it to disconnect from its underlying index, causing it to move more wildly. GAZ is currently trading similarly to a closed-end fund. I would advise investors to steer clear. iPath S&P 500 VIX Short Term Futures ETN ( VXX) -10.9% Despite seeing a heavy hit earlier in the week, the bulls remained unfazed heading into the final weeks of October. Market confidence throughout Sep and Oct has caused VXX and fellow VIX tracking ETN, iPath S&P 500 VIX MidTerm Futures ETN ( VXZ) to fall sharply. Macroeconomic issues remain present across many regions of the globe and I don't expect volatility to dissipate in the near future. However I wouldn't advise investors to try to capture uncertainty with VXX or any other VIX-related products.. Market Vectors Junior Gold Miners ETF ( GDXJ) -4.7% After rallying for weeks, precious metal prices at last saw a pullback, leading physically based funds such as iShares Gold Trust ( IAU) and iShares Silver Trust ( SLV) to notable losses. Weakness across these metals weighed heavily on miners, with the smaller, more volatile junior gold miners taking the hardest hit. Precious metals remain an attractive region of the market as investors seek out protection from the broad market volatility. Late last week ETF Securities unveiled their newest product, the ETFS Physical Precious Metals Basket Shares ( GLTR). Designed as a catch-all for precious metals enthusiasts, this fund provides exposure to gold, silver, platinum and palladium. Written by Don Dion in Williamstown, Mass.