Nikola truck recall, Urban Outfitters downgrade, Okta stock: Top stories

Nikola (NKLA) recalls over 200 electric trucks over concerns of battery fires. Urban Outfitters (URBN) receives a downgrade from Citi analysts despite expectations to beat second-quarter earnings. Okta shares rise on a Goldman Sachs upgrade citing growth estimates. Yahoo Finance Live checks out several of this morning's top stock stories.