“May is on track to be the second best in a decade on this measure,” Mr Ross added. Goldman Sachs acknowledged that some of the ASX’s underperformance was because of the sharp fall in US bond yields during March and April which supported a rally in technology stocks. The US tech sector accounts for about 27 per cent of the S & P 500, while Australia’s tech companies make up just 2 per cent of the ASX 200. Indeed, artificial intelligence-related stocks have fulled the S & P 500’s entire gains this year, according to AMP. The Dow Jones Industrial…