Morningstar's director of manager research, Russel Kinnel, has singled out 10 of the biggest manager changes announced so far in 2015 and analyzed the impacts of those changes. The list includes funds from T. Rowe Price Group, Vanguard Group and others; eight of the 10 experienced a "negative" impact, according to Kinnel, while the other two had a "neutral" impact. Read the original story from Morningstar.