The market for investing in infrastructure has matured considerably during the past 15 years. It used to be that closed-end funds were the primary way to access infrastructure businesses and assets, and while they still garner most of the attention, the market for other strategies to serve infrastructure investors is growing, giving investors more options to build and manage portfolios.

Infrastructure assets are long-lived — bridges, roads, airports, water and power systems all are built to serve communities for decades. Investors invest in infrastructure in part because of the opportunity to hold cash-yielding investments for a long period of time.

But there has been a mismatch between the investment strategies available to investors and the desire to hold infrastructure assets longer term. Closed-end funds, which have a typical lifecycle of 10 years, are the most popular avenue to investing in infrastructure and have served investors well. Investors who want to inv