@marketbeatmedia: GoPro spent years going almost nowhere. Then two major headlines sent the stock nearly 100% higher in two days. On Tuesday, Alumis moved just as violently in the opposite direction, losing more than half its value after a major clinical trial setback. Two stocks. Two headlines. Two reminders of how quickly the story can change on Wall Street. Here’s what moved GPRO and ALMS, plus what investors should watch next.

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Tuesday 01 September 2026 22:37:43 GMT