(Bloomberg) -- Troubled electric truck startup Workhorse Group Inc. has become the latest darling of retail traders, who have pushed its share price up 58% in just three trading sessions.The stock soared as much as 59% on Thursday, before closing up 28%, the biggest one-day move since Jan. 26. Workhorse, which is still in pre-production phase, saw its shares soar last year as investors scoured the market for the next Tesla Inc. That frenzy evaporated this year as many traditional auto companies