NEW YORK ( TheStreet) -- We hear stories all the time from investors expressing regret about "missing a run" in a stock. This is often a painful situation where we're reminded how clear the review mirror is.But I've learned this lesson long ago. I don't expect "what ifs" will cease to be a part of the investment process anytime soon. But this still doesn't make me feel better about my decision last year to wait on Nike ( NKE). More than once I've had an opportunity to jump in on this stock at much cheaper levels and I didn't "do it." This was prior to the company enacting a 2-for-1 stock split last December. As with rivals Under Armour ( UA) and Adidas ( ADDYY), I've spent the past year thinking that Nike's struggles in China would set the company back. In my case, I figured it would present an opening to buy lower. I was wrong. Remarkably, since Nike reached a pre-split low of $89.65 ($44.82 adjusted) per share on Nov. 14, the stock has surged more than 40%, including gains of 25% year-to-date. After the company's strong close to its fiscal year, during which fourth-quarter results beat on both the top and bottom lines, I don't see shares of Nike getting cheap anytime soon. The company posted 7% growth in revenue, which was roughly 2% higher on a constant currency basis. Growth was led by an 8% year-over-year increase in footwear, while apparel sales surged 20%. I've always believed that Nike was underrated in this category. Despite the strong showing in apparel, I still believe Nike management has room to add some serious pressure on Lululemon ( LULU) if it wanted. Nike is also doing well with its direct-to-consumer business, which grew 16%, helped by a strong 11% jump in North American same-store-sales for Nike-owned stores. I don't want to understate how impressive of an accomplishment this is, especially given the global economic headwinds that we've seen.