** Australian energy stocks .AXEJ rise as much as 3.8%, their biggest intraday pct gain since March 19
** Oil prices climb 8% to above $100 as the U.S. prepared a blockade of the Strait of Hormuz following failure to reach deal on Iran war
** Oil and gas producer Karoon Energy KAR.AX jumps as much as 9% to be the top percent gainer on the Australian benchmark S&P/ASX 200 .AXJO, which is down 0.4%
** Beach Energy BPT.AX up 6.2%, Woodside Energy WDS.AX jumps 3.6%
** AXEJ up 33.5%, YTD
(Reporting by Nichiket Sunil in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com))