By Damian Payiatakis, head of sustainable & impact investing, Barclays Private Bank

While sustainable investing is rapidly growing, challenges are on the horizon. As a megatrend, it will endure. But investors should consider how to position portfolios to get the best from the short-term risks and opportunities.

Sustainable investing, carrying considerable momentum from 2020, has flourished in 2021. With (hopefully) more success overcoming the pandemic and attention from the COP26 global climate summit in November, flows may accelerate further in coming months.

For investors, sustainability increas...