DRAM is up 98% since launching 5wks ago, easily the best perf ETF out of the gate (while also being the fastest growing ETF- at least to $6.5b). We looked and found a real estate ETF launched in late 2008 that went up 46% in a month but then faltered. Oh and it was also the 7th most traded ETF today with $4.5b. How high and far can it go?(Eric Balchunas)