Investors interested in Transportation stocks should always be looking to find the best-performing companies in the group. Greenbrier Companies (GBX) is a stock that can certainly grab the attention of many investors, but do its recent returns compare favorably to the sector as a whole? A quick glance at the company's year-to-date performance in comparison to the rest of the Transportation sector should help us answer this question.Greenbrier Companies is a member of the Transportation sector. This group in ...