The competitive nature of the athletic footwear and apparel segment is no more clear than this chart. Nike (NKE) was the dominant search term according to Google Trends, but Adidas (ADDYY) has dramatically closed the gap in the last year. The only issue with basing an investment decision completely on this trend chart is that Nike has spent more on promoting the Jordan brand that isn't captured in the above chart. Still, anybody looking at the issues hurting the stocks of both Nike and even Under Armour (UA)(UAA) needs look no further than Adidas. Evidently, Adidas finally took the Nike slogan to heart. Nike reports after the close: Do you really want to buy with Adidas and Under Armour amping up competition and the stock trading at 22x forward EPS estimates?Disclosure: Long UA