Crowded trades have become all too common in fixed-income markets. But running with the crowd is risky, particularly when it comes to illiquid assets like bank loans that may not be easy to sell during a market downturn.

Exceptionally low interest rates have at times over the last decade pushed yield-hungry investors into a handful of sectors with a high income potential—high-yield bonds, emerging-market debt, and so on. In the case of high-yield bank loans, the attraction has been floating-rate coupons, which can help shield these assets from the losses fixed-rate bonds may suffer now that low interest rates are finally rising.

The problem is that most of these higher-yielding assets carry varying degrees of liquidity risk. Liquidity measures how easy it is to buy or sell an asset without drastically affecting its price. Highly liquid bonds such as US Treasuries or German Bunds can be bought and sold easily in rising and falling markets.

Many other types of assets don’t fit the bill. Take bank loans: trades can take weeks to settle, and loans don’t change hands often. Yet most investors own bank loans through mutual funds or exchange-traded funds, highly liquid instruments that investors can enter and exit at will.

When Does Liquidity Dry Up? When Investors Need It Most

This creates a liquidity mismatch—vehicles that promise “daily liquidity,” but invest in assets that can’t be traded on a daily basis. That concerns us, because as we’ve noted here and here, we think bank loans will be vulnerable to large drawdowns when credit conditions become less favorable.

It would be a mistake for investors to assume they’ll be able to sell assets quickly—even those that may have appeared reasonably liquid in calmer conditions—without taking big losses. As anyone who buys and sells financial securities for a living knows, liquidity is a mercurial thing. It tends to be abundant when you don’t need it and scarce when you do. With the crowding in bank loans and even some other credit markets today, we think it’s safe to say that if everyone tries to exit at once, some won’t fit through the door.

Why Manager Selection Matters

Investors can certainly choose to avoid a particular sector. We’ve repeatedly advised as much when it comes to bank loans, where we think the risk outweighs the potential long-term reward.

But it’s nearly impossible to avoid liquidity risk altogether. Limiting portfolio holdings to high-quality government bonds and liquid short-term instruments isn’t an option for most investors—at least, not if they want to maximize potential returns and a portfolio’s earning potential. Most investors will need some level of exposure to less liquid—and at times congested—sectors of the fixed-income market.