Options premiums point to AA after Feb options expire
Looking at the options premium prices, Feb options are relatively cheap but March options spike up (from $1.55 to $4.00 per share for the $28.00 strike). This could indicate that accelerated approval (AA) is expected after Feb 15 when the Feb options expire.
The troubling part is that there is no confirmation in the open interest, so it is an uncertain read. If there was a dramatic spike in OI to match the premium difference, then it would confirm this idea, but we don't have that yet.