ABBV’s interest in SHPG does not affect ENTA (IMO), except possibly with respect to the timing of a potential ABBV offer for ENTA. I.e., if ABBV and SHPG were to proceed with a merger, other M&A activity by ABBV would probably be put on hold until the SHPG deal was consummated.
Note: I don’t consider ABBV the only company who might have an interest in acquiring ENTA.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”