Blackstone Group LP, the largest manager of alternative assets, is closing its two-year-old Senfina Advisors after it lost 24 percent in 2016. The $1.8 billion Senfina, which allocated money among a group of 11 portfolio managers, lost 6 percent last month alone, Bloomberg reported in December. It was a short-lived experiment for Blackstone, which started Senfina in 2014 as its first in-house, multi-manager fund. "The market environment in 2016 for long/short hedge funds...