MST is trading 3.39% lower at $13.49 after-hours, with no verified announcement explaining the decline. - It closed at $13.96 on October 21 after rising 13.29% during the regular session; major U.S. indices also finished higher. - MST went ex-dividend on October 21, with a distribution scheduled for October 22, but reporting does not establish that this caused the decline. - The fund tracks leveraged exposure to MSTR; no verified same-direction sector or market catalyst emerged.