[TolearnEnglish]Theexplosioninthevalueofartificialintelligencestocksposesriskstoglobalmarketsforwhichthereis"noplaybook",theCEOofDeutscheBank's1.1trillioneuro($1.3trillion)moneymanagerDWSsaid,amidgrowingconcernsthatthesectorisinabubble.TheAIstocksfrenzyhasdrawncomparisonswiththe1990sdotcomboomandbust,butDWS'sStefanHoopssaidtherecentrallywasdifferentasitwasbeingdrivenbyeverydayretailinvestors–notinstitutions–andtheyhadyettobetested.德意志银行旗下管理着1.1万亿欧元(1.3万亿美元)资产的DWS首席执行官称,人工智能股票价值的爆炸式增长给全球市场带来了风险,而应对这些风险“毫无先例可循”。与此同时,人们越来越担心该行业存在泡沫。人工智能股票的狂热被拿来与上世纪90年代的互联网泡沫破灭相提并论,但DWS的斯特凡·霍普斯(StefanHoops)表示,近期的这波上涨行情有所不同,因为它是由普通散户投资者而非机构投资者推动的,而这些投资者尚未经受考验。LearnEnglishLeavearemark