** ASX ASX.AX rises as much as 5.3% to A$60.980, highest since September 23
** Boure operator appoints insider Darren Yip as interim CEO, effective May 29
** Yip, who joined ASX in 2023 and is currently its group executive for markets and listings, will take over from MD and CEO Helen Lofthouse, who announced her departure in February
** ASX has faced regulatory scrutiny in recent years following series of operational issues
** YTD, ASX up ~18%
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))