Puma shares plunged more than 18% on Thursday after the German sportswear company reported weaker-than-expected fourth-quarter sales and a decline in annual profit. The results, released late Wednesday, have raised concerns about Puma’s ability to compete with larger rivals Adidas and Nike. The weak performance contrasts sharply with Adidas’ recent report of strong sales and profitability, underscoring the challenges Puma faces in gaining a larger share of the $400 billion global sportswear market. On a currency-adjusted basis, Puma’s quarterly sales
