I loved this movie the whole way through. All the characters are well portrayed: Murphy (at his funniest), Ackroyd (loved that Santa Claus scene with the salmon), Curtis who we see plenty of, Ameche and Bellamy as the amoral traders, and the utterly obnoxious Gleason (as Clarence Beeks) who gets his comeuppance in the end. Funny scenes all through this movie, lovely revenge-laden ending without violence - excellent movie, possibly Murphy's best.
Review of Trading Places
