It's all about the FAA certification Think about it - they announced FAA certification the day before, not on, investors day. Why would FAA certification come this long after European certification and why would they announce it the day before investors day and then halt the shares? My prediction is Delta, United or JetBlue has an order contingent on the CS300 being approved by the FAA and that's how it was kept under wraps. Now that it's announced the order can be made public and they halted shares to be fair to all investors before announcing it tomorrow.