What’s quite often? Blackouts only occur when there is news known to insiders. Few days before an announcement, earnings for example. If there is a blackout then there is news pending of some sort. I don’t know of a scenario where there is just random blackouts just because. The whole point of blackouts is to prevent insider trading on info not publicly available. Could be something not that meaningful, of course, but not sure what quite often means since they probably do it quarterly. If anything meaningful to it you’ll know Monday.