Is this a good buying opportunity or a value trip?With shares of specialty beauty retailer Ulta (ULTA -1.47%) getting hammered this year, despite the S&P 500 rising sharply higher, the stock has started to look quite attractive. Shares are trading at less than 15 times earnings as of this writing -- a huge discount compared to the S&P 500 and Nasdaq 100's price-to-earnings ratios of 24 and 31, respectively.Will a close examination of the retailer's stock reveal that it is as compelling as it appears on the ...