** Shares of Satsuma Pharmaceuticals STSA.O up 6.5% at
$5.90 premarket after Mizuho upgrades to "buy" from "neutral"
** Last week, co announced positive results from phase-1
trail of STS101 nasal powder for migraines urn:newsml:reuters.com:*:nL2N2NY332
** Analyst Vamil Divan says results gave increased
confidence on STS101's likelihood of being successful in new
Phase-3 SUMMIT trial
** Our increased confidence in STS101 leads us to increase
our probability of success for product to 70% from 35%
previously - Vamil Diwan
** Brokerage sees room for significant upside in share price
from current level despite limited near-term catalyst for stock
** Brokerage also raises PT to street high of $15 from $7,
representing a near three-fold upside from last close
** YTD, stock is up 20.1% as of last close
(Reporting by Aniruddha Chakrabarty)
((aniruddha.c.thomsonreuters.com@reuters.net))