Investors interested in Finance stocks should always be looking to find the best-performing companies in the group. Has Assured Guaranty (AGO) been one of those stocks this year? A quick glance at the company's year-to-date performance in comparison to the rest of the Finance sector should help us answer this question.Assured Guaranty is one of 860 companies in the Finance group. The Finance group currently sits at #9 within the Zacks Sector Rank. The Zacks Sector Rank considers 16 different groups, measuri ...