How did the then-current administrations (Harrison followed by Cleveland redux followed by McKinley/Roosevelt) deal with monopolists under the new Sherman Act? I do know that initially, the big trusts scoffed and the act was misapplied to break unions.
According to Felten's blog, the Friday ruling was posted on the court's website two hours before being announced, and while the market was open. The stock began to rise immediately.
[link|http://www.freedom-to-tinker.com/|Felten's Blog]