The long term Real Estate assets are the core strategy direct investments in office, retail, industrial and multi-unit residential properties located in major Canadian Centres. AIMCo's Infrastructure investments match long duration real return asset characteristics with inflation indexed-pension liabilities. The Infrastructure and Timberland assets are held to provide inflation hedging and a long-term duration match with client obligations. The Fixed Income portfolios are managed with the objective of capital preservation, liquidity, and risk-controlled return relative to benchmark. These asset classes make up 35% of AIMCo's AUM. AIMCo signed the United Nations Principles for Responsible Investment (PRI) in 2010. According to the 2018 Canadian Responsible Investment Trends Report, recognised the progress of major Canadian investors like the Alberta Investment Management Corporation, Canada Pension Plan Investment Board, Ontario Teachers' Pension Plan that are firmly involved in responsible investing as they acknowledge that "sustainability equals profitability." AIMCo's approach to "Responsible Investment" is governed by its "fiduciary duty" to clients and a long-term investment horizon. AIMCo seeks to maximize risk-adjusted returns by integrating "environmental, social and governance (ESG")")" factors into investment analysis across all asset classes. AIMCo's Responsible Investment processes include:  In December 2010, in an AIMCo-led private equity investment, it acquired a 50 per cent interest in Chile's Autopista Central's 61-kilometer, six-lane toll highway in Santiago on behalf AIMCo clients. In 2011 AIMCo divested its stake in Autopista Central to Abertis for about 1.5 billion. Through significant operational excellence, and eventual monetization, the private equity investment captured significant value add as it saw a positive ROI. In the same year, AIMCo, under a landmark transaction, acquired Morgan Stanley Infrastructure Partners 50% interest in the Chilean company from Inversiones Grupo Saesa Limitada (Grupo SAESA). This electricity transmission and distribution company is jointly owned by AIMCo and Ontario Teachers' Pension Plan (OTPP). In 2012, Stanhope, Mitsui Fudosan UK and AIMCo, on behalf of its clients, completed the purchase of the BBC Television Centre in West London. Construction began in summer of 2015 to develop homes, offices, hotels, retail and leisure facilities within this 13.7-acre area. In 2016, AIMCo's Infrastructure Private Equity group became the second largest shareholder of Howard Energy Partners, acquiring a 28% stake from EnLink Midstream Partners, LP.