SINGAPORE – Singapore stocks ended the week slightly higher despite a cautious mood around Chinese President Xi Jinping’s Sept 23-25 US state visit with President Donald Trump, where disputes over tariffs and artificial intelligence remained unresolved.The Straits Times Index rose from its Sept 18 close to finish at 5,711.12 on Sept 25. It had climbed to 5,723.76 on Sept 22, but gave up some of those gains as a sell-off in US government bonds pushed yields higher.Saxo UK investor strategist Neil Wilson noted “aggressive unloading” of US bonds on Sept 24, as the 10-year Treasury yield touched 5.23 per cent,…