Understandably, Everton chairman Bill Kenwright is keen to keep Moyes on Merseyside, and the chances are, in the short-term at least, that is where the Scot will stay.
However, after spending so many years punching above their weight, Ferguson feels Everton may be in trouble should Moyes walk away.
"It's obviously a concern for Everton," said Ferguson.
"It would be a big blow because he's a good quality manager.
"His ability is obvious.
"Whether he gets in the top four doesn't change my opinion of him, or anyone else's."