Levi Strauss & Co., Costco, Biogen: After-hours movers

Levi Strauss & Co. shares drop as the company slashes 2023 guidance. Costco reports a 0.4% increase in net sales for June. The FDA approves Eisai and Biogen's Alzheimer's drug Leqembi. Yahoo Finance Live's Seana Smith breaks down the after-hours movers.