Amazon shares rise 4.1% as Morgan Stanley lifts price target to $350

A single broker's price-target revision is a weak catalyst on its own, but the size of the reaction says more about positioning and sentiment than about fundamentals — a market primed to buy good news. The read-across matters most for the mega-cap complex that has carried index-level performance, since a 4.1% intraday move in a name this size is a broader risk-appetite signal. Whether a target change alone can sustain the move, or whether it fades once the headline is digested, is the open question.