Factual error: Bud Fox is sitting in the limo with the hooker talking about Hewlett Packard stocks. Bud says: "HP...now, let's see. It closed at 41 1/4." HP stock price was nowhere near that price until the 90s.
Continuity mistake: In the elevator scene at the start of the film, the man with headphones holding a newspaper appears and disappears during different shots. (00:02:00)
Continuity mistake: The NYSE trader who says "How is Anacott Steel?" is wearing a dark jacket, but in the following montage he is wearing the light colored one he wore later in the film when the Bluestar Airlines stock is traded. (00:35:40 - 00:38:00)
Visible crew/equipment: When Natalie is talking to Bud on the phone her assistant opens the doors to Gekko's office and 3 guests follow in single file. As the camera follows them in, their shadows are displayed on the right hand door. There is another shadow moving behind the last guest, which is someone in the film crew. (00:08:50)
Continuity mistake: The car Carl Fox is driving is on a 3 lane road with concrete barriers, that does not allow for parking. When the camera angle changes to show the interior, the car is on a road with vehicles parked on the sides. (01:53:20)
Continuity mistake: When Bud says "I never knew how poor I was until I started making a little money" Gekko moves his right hand to drop ash from his cigarette into the glass ash tray. When the camera angle changes to show Gekko smile, his right hand is stationary on his leg. (00:54:00)
Continuity mistake: During Bud's document signing scene there are a few glasses between Gordon Gekko and Mr Salt which are less than half full. When Kate asks Rudy to be taken for a nap the camera shows her for a few seconds, and when the camera returns to the table the levels are significantly higher, with not enough time to be refilled by the waiter. (00:56:00)
Continuity mistake: When Bud is asked about the cute analyst, Marv puts his left arm on a computer monitor, but when the camera angle changes in the next frame Marv has his back turned to the computer. (00:20:00)
Continuity mistake: In the club changing rooms Gekko fiddles with the knot of his tie but does not neatly fold his shirt collar, which exposes the tie at the back. When he puts on his jacket the collar and tie now appear properly dressed. (00:28:00)
Continuity mistake: At Gekko's party Bud is introduced first to Sam Ruspoli, Carmen Winters, then Stone Livingston. After Bud shakes hands with Ruspoli he extends his hand to Winters who remains seated. When the camera angle changes Bud shakes with Livingston but the handshake with Winters has been cut from the footage. The changing camera angle reveals another error. The paperwork that Bud gives Gekko inside his front door is now folded in half but the action to fold the papers has also been cut. (00:39:00)
Continuity mistake: When Gekko says that Ollie is the best trader on the street, Bud turns his head to his right, but when the camera angle changes in the next frame Bud's head is turned to his left. (00:16:00)