We argue that the ETF's greater concentration in mega-caps is currently an advantage over more diversified indices. Furthermore, we do not “buy” the idea of a bubble, and with favorable macroeconomic conditions, we recommend buying IWY with a six-monthAnalyst’s Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not rece ...