When the Exits Vanish: How Funds Run Out of Liquidity - Part 2

If you have not yet read yesterday's blog post, please do so before continuing here.

The Mismatch: Asset-Liability Runs

Some funds vanish not because their assets collapsed but because they promised investors something their assets could never deliver: the right to leave quickly. This is the asset-liability mismatch. The fund holds positions that take time to sell, while offering investors redemption terms that assume they can be sold instantly. In calm conditions the mismatch is invisible, because redemptions are a trickle and the fund meets them out of its more liquid holdings. In stress, the mismatch becomes the whole story.

The Reserve Primary Fund is the cleanest illustration. As a money market fund, it was built on the premise that a dollar in was always a dollar out. Exposure to Lehman commercial paper in 2008 broke that premise, the fund "broke the buck," and investors rushed to redeem before the value fell further. Open-end credit funds and some property funds have hit versions of the same wall, and their response - gating withdrawals or moving illiquid holdings into side pockets - is essentially the fund admitting the mismatch out loud after the fact.

Underneath this sits a first-mover problem that makes runs rational rather than panicked. If a fund can only meet a limited amount of redemptions at fair value, then the investor who redeems first gets out whole and the one who waits absorbs the losses and the forced-selling costs. Once that's true, redeeming early is the sensible move for everyone, which guarantees the rush. A run is not a failure of investor nerve. It's what happens when the structure rewards leaving first.

The Financing Rug: Counterparty Withdrawal

The final way the exit vanishes is that someone else closes it for you by pulling the financing that holds the whole position up. Most leveraged positions are not held outright. They're financed, through repo, through prime brokerage, through short-term borrowing that rolls over constantly. That financing depends entirely on the counterparty's confidence, and confidence can evaporate far faster than fundamentals change.

Bear Stearns is the reference case. The firm relied heavily on short-term repo to fund its positions, and once doubt set in, lenders began stepping back and raising the collateral they demanded. The funding base didn't erode gradually. It ran. A balance sheet that looked solvent on paper couldn't survive the speed at which its financing disappeared, because no position can be held if no one will finance it, regardless of what that position is ultimately worth. The earlier collapse of two Bear-managed mortgage funds in 2007 was the same mechanism in miniature: rising haircuts and retreating lenders forcing an unwind that the underlying assets, given time, might not have required.

The takeaway is that funding is not a fixed resource you control. It's a relationship that can be withdrawn, and it tends to get withdrawn at the worst possible moment, when everyone's counterparties are nervous at once.

The Common Thread

Five cases, five different triggers, one machine. In each one, forced selling met a thinning market. Mark-to-market losses on a shared position spread to everyone else holding it. Correlations that were comfortably low in normal times converged toward one exactly when diversification was supposed to do its job. And the loop between funding and market liquidity, the one set out at the start, did the rest.

The triggers are worth keeping separate because they tell you where to look: leverage compressing the runway, crowding hiding a position's true size, a mismatch between what is owned and what's promised, a financing line that can be cut. But the outcome is the same shape every time. The exit that everyone assumed was open turns out to have been open only on the condition that no one needed it urgently. Liquidity, it turns out, is mostly a story we tell ourselves during calm conditions.

What the Survivors Looked Like

It is worth noting the patterns associated with the funds that came through these episodes intact, presented here as observations rather than as a checklist. They tended to hold liquidity buffers deliberately, carrying assets they could sell without moving the price even when doing so cost them a little return in good years. Their redemption terms tended to match the liquidity of what they actually owned, so the asset-liability mismatch never opened up. Their leverage tended to be sized against stress conditions rather than normal ones, which left runway when spreads moved the wrong way. And their correlation assumptions tended to be ones that held up under pressure rather than only in the backtest, so diversification was still doing something when it was needed.

None of that is a formula, and survivorship makes any such list easy to assemble in hindsight. The more durable point is simply that each of these patterns is a way of keeping an exit open before you need it, on the recognition that you can't buy one once the rush has started.

Conclusion

Think back to where this began. Being right is necessary but not sufficient. The market can stay illiquid longer than a levered fund can stay funded, and the gap between those two timelines is where funds die. Every fund structure, whether it means to or not, is an answer to a single question: how long can it survive being right too early? The trade thesis gets all the attention, but the thesis is rarely what fails. What fails is the assumption that the exit will still be there when the time comes to use it. Liquidity is the quiet variable that decides whether a fund lives long enough to find out if it was right, and it's quietest of all in exactly the moments before it vanishes.