BOSTON (Reuters) - Activist investor Sahm Adrangi, who cemented his reputation with successful bets against Chinese internet companies, said that he has taken a short position against Qualcomm Inc, arguing the chip supplier's stock price could shrink by half. Adrangi's hedge fund Kerrisdale Capital published a research paper that suggests Qualcomm's profits could be at risk as the company faces lawsuits, especially one in the United States.