Famed short-seller Jim Chanos says he's still betting against Tesla as the EV maker 'wrestles' with margin pressures and increased competition

• Jim Chanos said he's still shorting Tesla as the EV maker faces margin pressures and increased competition. 
• He expects the Elon Musk-run carmaker's margins to fall as its China market weakens. 
• Meanwhile, Tesla faces competition from Chinese automakers including Nio and BYD who are taking massive market share. 

Jim Chanos is still shorting Tesla as the electric-vehicle maker faces margin pressures and increased competition. 

The famed-short seller and founder of Chanos & Company said Tesla's biggest market, China, is now the weakest, and that's going to hurt it's margins.