Alibaba short sellers battered after stock soars to record high

Investors betting that Chinese e-commerce giant Alibaba Group Holding Ltd.'s … Alibaba short sellers are down $2 billion in mark-to-market losses on the … the largest short worldwide, more than doubling Tesla's TSLA, -1.27% short … The stock has gained 91% in 2017, dwarfing Amazon's 28% gain.