Here's why Ulta Beauty's stock looks attractive.In a surprising move, Warren Buffett added cosmetic retailer Ulta Beauty (ULTA -0.04%) to Berkshire Hathaway's portfolio in the second quarter. Buffett isn't afraid to own retailers in his portfolio, holding Walmart shares for over 20 years before exiting the position in 2018. However, it has not been a big focus of his in recent years. The only other retailers currently in Berkshire's portfolio are e-commerce giant Amazon and flooring and tile retailer Floor ...