Tesla Motors shares slid Tuesday as Citron Research revealed a short position in the electric automaker's stock.
In a tweet, the short-selling firm contended that Tesla shares could fall to roughly half their current value by the end of the year due to supply and demand problems. The "news flow all around does not look good" for Tesla, Citron wrote.
The company's shares fell more than 4 percent at their lows Tuesday, but pared those losses. Tesla did not immediately respond to a request for comment.
Growth and production concerns swirl around Tesla as the automaker launches its Model X and Model 3 vehicles. Citron — a foe of embattled drugmaker Valeant Pharmaceuticals — said Tesla's stock could fall to $100 per share from above $180 currently.