** Shares in Belgian biotech company Argenx ARGX.BR rise
4%, with KBC analysts saying its Vyvgart drug is still the top
contender despite positive trial data from a competitor
** Amgen AMGN.O on Tuesday reported favourable phase 3
data for its Uplizna drug in treating rare muscle-weakening
disease myasthenia gravis
** "We deem the Uplizna dataset to be strong yet somewhat
less compelling than Vyvgart," KBC says
** "Vyvgart has shown strong effects already at week 4, and
thereby oversteps the efficacy of Uplizna at week 26," KBC adds
** The shares are on track for their best day since Aug. 9
if the gains hold, topping Belgium's blue-chip BEL 20 index
.BFX
** Including Wednesday's rise, they have gained 42% YTD
(Reporting by Dimitri Rhodes)
((Dimitri.Rhodes@thomsonreuters.com))