In our 2025 Year Ahead Investment Directions, we discussed how risk factors such as broad tariff implementations, curbed immigration policy, and mounting deficit concerns could impede the trajectory of solid economic growth in the U.S. The levels of extreme uncertainty that have battered the market since have demonstrated the importance of portfolio diversification amid unpredictable market swings. Crucially, we believe investors can benefit from a more deliberate diversification strategy, where traditional asset classes may not meet the moment.
In the past few years, elevated interest rates and low equity risk premiums had eroded the negative equity-bond correlation that benefited a 60-40 portfolio for decades. This challenge could linger in a world of rising macro uncertainty, reinforcing the importance of alternative sources for portfolio diversification.
Diversify a portfolio with gold and infrastructure:
In an environment of continued macro uncertainty, we believe gold could function as a viable alternative in investor portfolios. Our analysis shows that a small addition of gold in a portfolio could boost its Sharpe ratio for 1- year, 3- year, 5- year and 10- year time periods.23
Gold may also be used as a hedge against monetary debasement and fiat currency risks. Historically, government debt levels have shown a positive correlation with the price of gold.24 Rising deficit levels across many developed economies, particularly in the U.S., have raised concerns about currency stability, making safe-haven assets like gold more attractive. (Learn more about U.S. deficit dynamics)
In addition, global central banks, which own nearly 20% of all physical gold ever mined, have significant influence on gold demand.25 Rising geopolitical uncertainty has prompted these institutions to bolster reserves, with Asian countries being particularly strong net buyers.26 We expect this trend to continue given the potential for them to diversify away from the U.S. dollar given more aggressive trade policies.
Besides gold, public and private infrastructure can also potentially bring portfolios diversification benefits. Over the past 17 years, public infrastructure has offered investors stable returns and a low correlation to other traditional asset classes, with added liquidity benefits compared to private infrastructure.27 In addition, long-term mega forces such as AI datacenter and sustainable transitions speak to the attractiveness of infrastructure as a strategic allocation for investors.
Diversify a portfolio with cash alternatives:
Cash can be another alternative asset class to consider in a highly volatile environment. Cash-like alternatives, such as short-term bonds, have typically been less sensitive to changes in interest rates and equity market uncertainty — consider, short-term bonds, on average, have had a lower correlation to stocks.28
Cash-like strategies diversify portfolios away from near-term ups and downs by seeking to preserve capital. By parking cash in a lower risk asset, investors can later deploy it in places that may be attractive when market conditions support.