Reputable companies generally give shareholders at least a few hours to digest a significant announcement or one that contains a significant amount of news that might affect investment decisions, specifically one that affect the share price or earnings in a negative way. Best would have been to release such an announcement prior trading day post market or pre-market at 07:30. Not with 10 minutes until open as it then is purely feed for speculators and destabilization short term. Some dodgy companies wait for an absolute bloodbath on the market and release bad news then for camouflage. Most CFO's understand this. Arguably over a two month time frame post such an announcement there ought to be little affect on end result share price, but value accorded to reputation is unquantifiable... imo.
