S&P 500AI optimism sends Nasdaq to new post-Covid highInvestors expect artificial intelligence to unleash a new wave of growth.BusinessStocks surge to record high marking market reboundInvestors have been cheered by hopes that the US central bank's campaign of raising interest rates is over.BusinessGlobal stock markets fall as economy fears growThe Dow Jones share index closed below 30,000 at its lowest level in more than a year.BusinessGlobal shares fall as growth fears rattle investorsUK shares slide after more signs of waning consumer confidence trigger steep falls in US markets.BusinessShares fall in Asia and US as interest rates riseThe sell-off comes as worries intensify over how the rising cost of borrowing will affect economic growth.BusinessAmazon sell-off ends dismal month for US sharesMajor US stock indexes took a slide in April, with the tech-heavy Nasdaq seeing its worst month since 2008.BusinessGlobal stocks lower as tensions rise over UkraineThe falls came as the US accused Russia of preparing fabrications to justify an invasion.BusinessMarkets rally on hopes of Ukraine de-escalationGlobal markets jump amid hopes that military tensions over Ukraine could be easing.BusinessStock markets hit by Ukraine invasion fearsShare prices fall across Europe, but losses are lower in the US amid hopes of a deal with Russia.Business