** Shares of child safety tech firm Spacetalk SPA.AX rise 18.4% to A$0.29
** Co signs exclusive worldwide licence for Watch Walk, an AI-developed gait biomarker algorithm, with a combined team including Neuroscience Research Australia
** Co to embed Watch Walk as subscription app in its wearable devices to predict user's risk of serious health conditions including stroke and heart attack
** Stock rose as much as 22.5% earlier in the session
** Stock up 87.1% YTD, including current session's moves
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))