** ASX-listed shares of Block rise as much as 8.1% to A$102.99, posting their biggest intraday percentage gain since May 3

** Stock biggest gainer on the S&P/ASX 200 benchmark index

** U.S.-based payments firm sees annual adjusted core earnings of at least $2.90 billion, higher than its prior forecast of $2.76 billion

** Reports quarterly earnings of 93 cents per share vs estimates of 84 cents, according to LSEG data

** About 420,000 Australia-listed shares change hands, compared with the 30-day average volume of around 215,200

** Stock trims YTD losses to 14.2%, including session's move

(Reporting by Aaditya Govind Rao in Bengaluru)

((Aaditya.govindrao@thomsonreuters.com;))