Markets continued Friday's weakness with more selling action. Boeing (BA) slipped into the red after one of its 737-800 jets was involved in a deadly South Korean plane crash. Tesla (TSLA) became another notable laggard after the company recalled nearly 700,000 vehicles. Nvidia (NVDA) had one of the day's few green shoots likely in part from ByteDance's multi-billion dollar plan to buy its A.I. chips. Jenny Horne breaks down the day's biggest stories.