The typical move is the median size of the AMZN move after a story, up or down. An unusual reaction is more than twice the normal hourly move. A move after a story is not shown to be caused by it. How it is measured
Investor's Business Daily and Seeking Alpha Market Currents report that Amazon is in talks to acquire AI startup Decart for $7 billion, citing reports and the WSJ. Investor's Business Daily states Amazon stock was flat following the reports. Seeking Alpha also published a piece asking who Decart is, describing it as an AI startup and a $7B acquisition target.