At the beginning of the movie, it states the year as being 1985. Just a few minutes later, someone makes a reference to the Space Shuttle Challenger explosion. Correct me if I'm wrong, but didn't the Challenger explode in January of '86?
This is a wonderful catch, and should receive a full 10 points! The movie starts out by making a VERY BIG DEAL that they were in 1985, probably to remind people that it was PRIOR to the big market crash of October 1987. Problem is, they were so obsessed with showing the market before the '87 plunge that they totally forgot Challenger happened in January 1986.