The Ontario Teachers' Pension Plan Board (French: Régime de retraite des enseignantes et des enseignants de l'Ontario) is an independent organization responsible for administering defined-benefit pensions for school teachers of the Canadian province of Ontario.Ontario Teachers' also invests the plan's pension fund, and it is one of the world's largest institutional investors. One of the largest pension funds in the world is close to using hedge funds, a move many of its peers have already made. The United Nations Joint Staff Pension Fund, which managed $52.4 billion as.