Continuity mistake: At the end, when Bud is walking the steps to court, the number of people next to him swaps dramatically between the close and aerial angle.
Continuity mistake: Buddy is having some drinks with Gekko, after he says "It's a piece of cake" the filming crew is reflected on his sunglasses.
Answer: It's probably just a movie inaccuracy. For whatever reason, probably technical, economical, or for artistic considerations, the scene could have been staged and shot during sunset rather than sunrise. Oftentimes, scenes are not actually filmed when and where they are supposedly set. Locations are often substituted for ones that are more private, more scenic, have easier physical access, are in a less expensive economic region (such as Canada), and so on.
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