The proposal comes as record-low interest rates prompt pension funds and their investment managers to chase higher yields. : A group of infrastructure investors has proposed one of Australia’s biggest-ever buyouts, a A$22.26 billion ($16.7 billion) purchase of Sydney Airport Holdings, taking a longer-term view on the pandemic-battered travel sector. The proposal comes as record-low interest rates prompt pension funds and their investment managers to chase higher yields. The purchase, with an enterprise value of A$30 billion including debt, would allow them to reap financial benefits when borders reopen and travel demand rebounds.