00:00Moderna shares plunged after details of its experimental cancer vaccine trial leaked
00:05ahead of a scheduled presentation, even though the results were positive.
00:09The vaccine, developed with Merck for melanoma patients,
00:12helped reduce the risk of cancer recurrence or death when combined with Keytruda.
00:17But investors had built up high expectations,
00:20and the early release of the data sent the stock into a sharp sell-off.
00:24The reaction shows how even promising medical advances can trigger market turmoil
00:28when investor expectations run ahead of the science.
