Harvard Management Company sold its majority stake in a 13-building portfolio to Blackstone Group for $243.6 million, in one of the city’s big year-end multifamily deals amid a sluggish market. Harvard had owned the properties, which are spread through Manhattan and Queens, in partnership with multifamily giant A&E Real Estate Holdings and investment manager Edge Principal Advisors. Property records filed with the city Wednesday show an entity tied to Blackstone acquired Harvard’s 81.7 percent stake […]