Shares of Workhorse Group are down 87c, or 5.4%, to $15.19 after short-selling research firm Hindenburg Research issued a tweet regarding a short position in the stock. Hindenburg announced its short via Twitter, stating that it sees “immediate 50% downside.” The company “has an astronomical valuation of ~$1.5B despite less than $100k in revenue last quarter. We see the chance of winning a material USPS contract as virtually zero. A reality check is on its way,” added the firm in its tweet.