Nike's stock is one of the worst in the S&P 500 - and BofA says it's not done sliding

By Bill PetersBofA analysts say they now expect falling sales through May, dashing prior hopes for a 'spring inflection'Nike's stock is down around 44% so far this year. The company reports quarterly results next week.Sneaker giant Nike is currently the S&P 500 Index's 13th-worst-performing stock s…