I just can't help but follow the money trail. One has to be very careful with public limited companies, since the very early announcement of gene therapy, the shares of Bluebird has jumped 65% in last four days (amazing). The share is in the oversold territory with RSI of approx 84 times. Now, I am a little worried about the timing of Blue bird announecement, since they recently have two earnings downgrades by the analysts.
The share was going to fall on earth, untill the recent announcement. This is just another perspective.
We all know what happened to some other experimental companies (who claimed to have find the jackpot process), but in the end are now trading over the counter (they are not listed anymore).
From the Thal point of view (I hope the best to BlueBird).