Pure Storage is trading 10.86% down at €109.95 amid pressure on technology shares as investors question whether heavy AI investment will generate returns quickly enough. - Reuters reported tech shares slumped on October 30 amid those concerns. - No specific Pure Storage announcement or company-level catalyst explaining the decline surfaced in available search results; cited coverage points to an industry-wide reassessment of AI spending and returns, rather than a confirmed event specific to Pure Storage.