This parabolic ascension is attractive for those who decided to get in early. While enticing, I would encourage investors lacking exposure to funds like IBB and the SPDR S&P Biotech ETF ( XBI) to avoid chasing gains here. Market Vectors Gold Miners ETF ( GDX) Gold miners spent much of the past week heading higher. Any gains, however, were dashed on Friday as the fund succumbed to its 200-day moving average. Looking to the days ahead, it will be interesting to see if this level will be tested once again. Despite the metal's designation as a safe haven, gold-related funds like GDX and iShares Gold Trust ( IAU) have staged impressive rallies during the opening weeks of the year, following the broader market higher. Investors and market followers are questioning whether gold miners, after a disappointing showing in 2011, can find some footing in the months ahead. Written by Don Dion in Williamstown, Mass.