Abstract: HSTECH June 2026 added KNOWLEDGE ATLAS and MINIMAX-W and deleted KINGSOFT and KINGDEE INT'L. All event windows through the fourth post-implementation week are complete. Both ADDs fell in the first implementation week, far beyond the historical ADD first-week means. KNOWLEDGE ATLAS then gained +46.8% in weeks two to four. The positive-bridge DELETE rebound held for KINGSOFT at +3.9% but missed for KINGDEE INT'L at -12.3%.
MINIMAX, KNOWLEDGE ATLAS, Kingdee, KINGSOFT, XPENG, WB
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