Cognex is trading at $58.92, up 4.93%, with no newly identified company-specific catalyst. - Broader market is rebounding, with Nasdaq Composite futures up 0.89%; this may support tone but does not explain the larger move. - Cognex said Q3 results are due November 4 after the close; the RealSense acquisition was announced September 22, making it prior context, not a confirmed fresh catalyst. - Shares were already up 4.01% after hours October 30, when the cause was unclear.