** Shares of Stakk SKK.AX rise as much as 350% to A$0.027, their highest point since August 18, 2022
** Stock posts its biggest intraday pct gain since July 4, 2014
** The banking software company secures a 2-year master services agreement to deliver its embedded finance solution to U.S.-based Robinhood Markets Inc
** Says the revenue Stakk will generate under agreement depends on the success of Robinhood's new banking offering
** Around 219.3 million shares change hands, 177.2x the 30-day average volume
** SKK last up 300%, lifting YTD gains to 242.9%