The phone call came on a Friday afternoon in 2020, and the portfolio manager who took it still remembers the number. A dealer offered to buy a block of investment-grade corporate bonds at a price 12 points below where they had traded on Wednesday. Not 12 basis points. Twelve full points. The bonds were issued by a household-name company. Nothing had been announced. The market had simply stopped functioning as a market, and the price of certainty had become extortionate.

That week, in March 2020, the Federal Reserve intervened with facilities to support corporate credit, including purchases of bond ETFs, and liquidity gradually returned. But the episode left a permanent mark on how serious bond managers think about exits. Price is not the same as value, and a quoted price is not the same as an executable price. When everyone wants to sell, the cost of leaving can exceed any loss already shown on paper, and the decision to exit becomes a negotiation with a market that has temporarily lost interest in negotiating.

Why bond liquidity is different

Equity investors take continuous liquidity for granted. A large-cap stock trades thousands of times a day. A corporate bond may not trade at all in a given week. The U.S. corporate bond market is vast — roughly $11 trillion outstanding — but it is fragmented into tens of thousands of individual securities, each with its own maturity, coupon, covenants, and call provisions. A dealer who buys a bond must hold it, hedge it, and find another buyer, and charges for that service through the bid-ask spread.

In calm markets, that spread is modest for large, recent issues: often a few basis points for Treasuries and a fraction of a point for liquid investment-grade bonds. In stressed markets, academic research and Federal Reserve studies have documented spreads widening severalfold, with the worst deterioration in high-yield bonds, smaller issues, and bonds held heavily by mutual funds facing redemptions. The pattern is pro-cyclical and cruel: the moment a manager most wants to sell is the moment selling is most expensive.

Trading has modernised, but it has not repealed this logic. MarketAxess and Tradeweb now handle tens of billions of dollars in daily corporate-bond volume, and portfolio trading — executing a diversified basket in a single trade — lets a manager exit faster than calling dealers bond by bond. None of that guarantees a good price when the entire market is heading for the same door.

Fallen angels: the exit that is forced on you

Nowhere is the cost of a delayed exit clearer than in the fallen-angel trade. When a bond is downgraded from investment grade to high yield, a large class of holders — index funds tracking investment-grade benchmarks, insurers with rating constraints, pension funds with investment-grade mandates — must sell, whether they want to or not. Research from the Bank for International Settlements and from index providers has shown that fallen angels often underperform in the months around the downgrade, as forced selling meets a smaller pool of high-yield buyers, before recovering over longer horizons as value buyers step in.

Ford Motor Company provided the textbook case in March 2020, when S&P Global Ratings cut Ford to below investment grade, adding roughly $36 billion of debt to the high-yield universe in a single action. Kraft Heinz had suffered a similar fate in February 2020, when Fitch downgraded the food company, creating one of the largest fallen angels on record at the time. Managers who had sold Ford or Kraft Heinz bonds on deteriorating fundamentals — rising leverage, weakening cash flow, a dividend under pressure — exited on their own terms. Managers who waited for the rating agencies to act exited on the market's terms, into forced-selling pressure, at wider spreads.

The lesson is not that rating agencies are villains. It is that a downgrade is a lagging indicator. Balance-sheet deterioration shows up in earnings, in leverage ratios, in management commentary, and in credit-default-swap spreads long before a formal rating change. An exit discipline that waits for the downgrade has already surrendered its advantage.

The costs most investors forget

Beyond the bid-ask spread, three quieter costs shape every exit. Opportunity cost: cash raised by a sale earns short-term rates until reinvested — small in 2022, when bills yielded over 4 percent, punishing in 2020, when bills yielded near zero — so every sale needs a reinvestment plan with a deadline. Tax: a gain owes tax, a loss may offset gains elsewhere subject to wash-sale rules, and a sale attractive pre-tax can look far less so after tax. Information cost: selling a large position can signal distress and invite wider quotes on the remainder, so experienced desks stage exits in smaller clips or use portfolio trades. Howard Marks, co-founder of Oaktree Capital Management, has written extensively about this second-order thinking — not merely whether an asset is cheap, but what the market's reaction to your trade will reveal and cost.

The counterargument: sometimes the expensive exit is still right

It would be a mistake to conclude that high exit costs argue for never selling. Sometimes the expensive exit is the cheapest option available. A bond heading toward default loses far more than any bid-ask spread. A portfolio facing large redemptions cannot meet them with illiquid holdings, however attractive their yields look on paper. And a mandate breach — holding a bond that no longer qualifies for the fund — can create legal and reputational costs that dwarf trading friction.

In March 2020, managers who refused distressed prices and held high-quality bonds were largely rewarded as Fed intervention restored liquidity. Managers holding bonds that ultimately defaulted learned the opposite lesson. Distinguishing those groups in real time requires credit analysis, not merely a view on spreads.

The synthesis, again, is preparation. A manager who knows, before stress arrives, which holdings are liquid, which are semi-liquid, and which would be effectively unsellable in a crisis can meet redemptions from the liquid tier and hold the rest. A manager who discovers the liquidity tiers during the crisis has no good choices left. Liquidity budgeting — a simple, regularly updated map of how quickly each position could be sold and at what estimated cost — is unglamorous work. It is also the difference between an orderly exit and a fire sale.

Implications for every bond holder

For individuals, that means favouring diversification: a fund holding hundreds of bonds can meet redemptions from its most liquid holdings; a concentrated portfolio cannot. For advisers, it means discussing exit costs before they arise. For institutions, it means treating liquidity as a risk factor alongside duration and credit, with limits to match.

Bond markets will seize up again. They always do, roughly once a decade, and the trigger is never the one forecast. The managers who navigate the next seizure best will not be those who predicted it. They will be those who, in calm years, built a map of their exits, priced the cost of leaving, and rehearsed the decision to leave before the phone call came on a Friday afternoon offering twelve points below Wednesday's price. When that call comes, they will already know the answer.