Lordstown Motors Corp. jumped after saying it has enough money to make its battery-powered trucks through May of next year, paring a record decline the previous day following the departure of two top executives.

Since taking the wheel at Nikola Corp. in September, Mark Russell has been adamant the electric-truck startup doesn’t need a deal with General Motors Co. to survive. Now he has to prove it.

Nikola Corp. wants to put allegations of deception behind it with a push to showcase its own innovations and detail how it plans to get its clean-powered trucks to market.