** Shares of Enanta Pharmaceuticals ENTA.O down 11% premarket to $10.65 after $65 mln overnight follow-on priced
** Watertown, Massachusetts-based biotech firm late Tues announced 6.5 mln shares at $10, a 16.5% discount to their last close
** Offering size boosted from $50 mln
** JP Morgan, Jefferies and Evercore acting as joint bookrunners
** ENTA shares on Mon surged 92% to $15.16 after co said its RSV treatment significantly quickened recovery in mid-stage study; shares fell 21% on Tues
** Co intends to use net offering proceeds to fund clinical trials, R&D, among other purposes, per the prospectus
** 5 of 7 analysts rate the stock "strong buy" or "buy" and 2 rate "hold"; median PT is $20, according to LSEG data
( Lance Tupper is a Reuters market analyst. The views expressed are his own)
((lance.tupper@tr.com 1-646-279-6380))