Why the Sixers haven't made a trade

Philadelphia is full-speed ahead in rebuild mode, and if the first half of the season has proven anything it's that the Sixers found have a a couple good pieces to build around in Michael Carter-Williams and Tony Wroten. Nerlens Noel is certainly potentially another one.

But with the Sixers (12-25) currently holding the third-worst record in the Eastern Conference, it's clear that contending is still likely a few years away.

So why, then, has the team with numerous attractive trade candidates (Spencer Hawes, Thaddeus Young, Evan Turner) not yet made a move?