** Australian technology sub-index slips as much as 1.3% to hit its lowest level since Aug 21

** The sub-index tracks overnight losses on Wall Street

** ASX-listed shares of Block Inc fall as much as 3.7%, their biggest intraday pct loss since Aug 7

** Shares of Xero retreat as much as 1.4%

** The tech index has jumped ~37% YTD, much more than benchmark ASX 200's near 6% rise

(Reporting by Echha Jain in Bengaluru)

((Echha.jain@thomsonreuters.com))