Investors interested in Finance stocks should always be looking to find the best-performing companies in the group. Has Aflac (AFL) been one of those stocks this year? By taking a look at the stock's year-to-date performance in comparison to its Finance peers, we might be able to answer that question.Aflac is a member of the Finance sector. This group includes 860 individual stocks and currently holds a Zacks Sector Rank of #1. The Zacks Sector Rank considers 16 different sector groups. The average Zacks Ra ...