In a recent interview with MUTV, the boss explained why United do not sign players "on a whim" because of a detailed long-term policy when it comes to transfers. With plenty of last year's FA Youth Cup-winning side impressing at Reserves level, he feels the squad is big enough to cope with any more pitfalls that lie ahead.
"I don't think I'll change my tactic on that [buying in January] because, if there's a player who I have been interested in, and he was available in January, we would try and do business," said Sir Alex.
"But there's no such player really on the horizon that way, unless we can identify someone we've been monitoring a lot because we don't buy just on a whim at this club.
"Normally, we try and have a good progress report on the player, particularly background information on him and there's no-one at this moment in time who meets that criteria."
Meanwhile, the talented batch of teenagers at United are constantly in the manager's thoughts as they continue to make progress through the ranks - even if he is being understandably patient with their development.
"They're getting stronger as they get older," added Sir Alex. "Paul Pogba will be 19 in March. Ezekiel Fryers has been involved. Larnell Cole, Jesse Lingard and Ravel Morrison have all been involved.
"When you think 'okay, possibly the standard has risen since the days when Ryan [Giggs] made his debut at 17, even our Darren [Ferguson] was