In fantasy keeper leagues, many owners are at the point of deciding to go for a 2015 title or begin planning for next year. Those who determine they are no longer contenders will likely start trading current value for future value.
This is a normal part of a team's life cycle.
The problem comes when a disproportionate amount of talent is dealt from one owner to another. Many fantasy leagues are plagued by these "dump" trades. But in most cases, the perceived inequity is overblown, and a deeper analysis of the situation reveals hidden upside for both clubs.