He was known to be among the best value investors. He was so good at shorting that a sentence from his mouth can cause XX% loss in the stock he shorted. I am sorry to hear what happened to him this year. I wonder what can we learn from the terrible performance of the great master in 2018. Why did his risk management fail him? https://www.reuters.com/article/us-...und-greenlight-grow-in-november-idUSKCN1O02X5 BOSTON (Reuters) - Billionaire investor David Einhorn told investors on Friday that losses at his hedge fund Greenlight Capital grew this month, leaving the fund down nearly 28 percent for the year.