EnteroMedics tries to regain momentum; shares up 51%

• The white knuckle ride with EnteroMedics (ETRM +51.3%) continues in early trading on triple normal volume. Shares rocketed almost 15-fold in five days recently after the company reported that two new medical centers had incorporated its vBloc obesity treatment into their practices. The gain was short-lived however. Shares retraced 80% before recovering.
• Previously: EnteroMedics says two more institutions on line with vBloc; shares up 126% (Jan. 5)