Nikola shares plunge 16% after CEO says plans intact even without GM

Green vehicle startup Nikola's shares fell by 16% after CEO Mark Russell said they will revert to a "base plan" without General Motors (GM) if a deal isn't agreed upon. GM announced last month it is taking an 11% stake in Nikola in a strategic partnership. "We’re working on the details," said GM, adding the deal hasn't been finalised yet.