(Bloomberg) — A co-founder of SenseTime Group Inc. lost almost half of his fortune after shares of the artificial intelligence giant plummeted 47% on Thursday. Most Read from Bloomberg Tang Xiao’ou, a Massachusetts Institute of Technology graduate and information engineering professor at the Chinese University of Hong Kong, has a 21% stake in the company. His net worth plunged by about $2.4 billion to $2.8 billion, based on the closing share price, dropping him off a list of the world’s 500 richest people, according to the Bloomberg Billionaires Index. The fall of SenseTime occurred after the lock-up period on a...