March 2020: the dash for cash
Why even deep markets became strained when investors raised cash and leveraged positions faced margin pressure.
Why this event still matters
March 2020 is often remembered as an equity crash, but its deeper significance was a system-wide demand for immediately usable cash. As the pandemic outlook deteriorated, companies, households, funds, and leveraged investors all tried to strengthen liquidity at once. They sold not only risky securities but also assets normally kept because they were considered safe and easy to trade. [2][5]
The pressure reached the US Treasury market, the core collateral and benchmark market for global finance. Bid-ask spreads widened, market depth declined, and dealers struggled to intermediate unusually large and one-directional flows. The episode demonstrated that credit quality and market liquidity are different properties: an asset can remain a sound obligation while becoming difficult to sell at a stable price. [1][2]
Event reconstruction
Risk is repriced
Concern about the economic shock spreads across equity, credit, commodity, and funding markets.
Cash becomes the priority
Funds and institutions sell liquid assets to meet redemptions, margin calls, and precautionary cash needs.
Core markets strain
Treasury depth declines, bid-ask spreads widen, and price impact rises.
Policy response stabilizes liquidity
Large-scale facilities and purchases help restore market functioning.
Why investors demanded cash
The pandemic shock created simultaneous uncertainty about economic activity, funding needs, and asset values. Households, funds, companies, and leveraged investors sought cash or the safest short-term instruments. Selling was not limited to assets considered risky; market participants sold liquid holdings because those were the positions they could convert quickly. [1][2]
Margin calls and redemptions reinforced that demand. When volatility rises, leveraged portfolios may need additional collateral even when their long-term view has not changed. Raising cash becomes a constraint rather than an investment preference. [1][2]
How policy restored market functioning
The Federal Reserve did more than lower interest rates. It purchased Treasury and agency mortgage-backed securities at exceptional scale and introduced facilities to support money markets, dealers, corporate credit, and dollar funding. These measures supplied cash and balance-sheet capacity where private intermediation had become constrained. Their immediate objective was market functioning and the continued flow of credit, not the elimination of investment losses. [2][5]
The distinction is important for interpreting the rebound. Improving liquidity can narrow spreads and allow transactions to clear without restoring every asset to its previous value. A trader should not treat policy support as a guaranteed price floor. Authorities choose instruments for system-wide objectives, and those objectives may differ from protecting one market, strategy, or collateral type. [2][5]
A practical liquidity stress test
A useful stress test combines shocks that are often modeled separately: the position falls, collateral receives a larger haircut, funding costs rise, bid-ask spreads widen, and part of the portfolio cannot be sold promptly. The result should be measured against cash immediately available in the account, not against assets that might be transferable after a delay. [1][2]
The exercise should also distinguish voluntary and forced time horizons. An investor may be correct over six months but unable to survive a margin call due tomorrow. Holding unencumbered liquidity reduces the probability that the market chooses the exit time. That reserve has an opportunity cost in calm periods, but March 2020 showed the value of paying it. [1][5]
Stress reached the Treasury market
US Treasury securities are central to global liquidity, but market depth deteriorated during the most intense period. Bid-ask spreads widened and price impact increased as dealer intermediation capacity met unusually large flows. The event demonstrated that a market can remain open while becoming materially more expensive to use. [1]
Leveraged relative-value positions were one source of pressure. If a strategy holds cash securities against futures and financing conditions change, deleveraging can create sales in the cash market and offsetting activity in derivatives. Similar-looking trades can become crowded even when they originate at different firms. [1][2]
Correlation changed under forced selling
Assets that normally diversify one another can fall together when participants sell whatever has liquidity. Correlation in a crisis is partly a function of shared funding constraints. A portfolio can therefore be diversified by economic story but concentrated in its dependence on market liquidity. [2]
The Federal Reserve introduced large purchases and facilities intended to restore market functioning and the flow of credit. Conditions improved as buyers with balance-sheet capacity returned and urgent cash demand eased. [1][2]
Application to leveraged accounts
A trader should stress position loss, collateral availability, spread expansion, and funding needs together. Modeling each risk independently understates the case where all four deteriorate at once. [1][2]
The event also separates price volatility from liquidity risk. A stop can define when a thesis is invalidated, but the actual loss still depends on whether executable liquidity exists at or near the trigger. [1]
Who sold and why intermediation struggled
Federal Reserve analysis estimated that foreign investors sold almost $420 billion of Treasury securities in March. Foreign official institutions raised dollars for domestic needs, while investment funds facing redemptions often sold their most liquid Treasury holdings. Separately, estimated hedge-fund Treasury holdings declined by about $141 billion during the month. [3][4]
Dealers absorbed part of this supply, but balance-sheet and risk capacity are finite. Measures of collateral reuse fell as intermediation became constrained. Large Federal Reserve purchases and funding facilities helped restore the circulation of securities and cash, reducing the need for private balance sheets to warehouse the entire shock. [1][2]
What to carry forward
The dash for cash is a warning against treating liquidity as a fixed label attached to an asset. Liquidity depends on who needs to trade, why they must trade, and which balance sheets can take the other side. A resilient account holds enough unencumbered collateral to avoid becoming a forced seller when volatility, margin, and spreads rise together. [1][2][5]
Margin calls can force sales of otherwise preferred assets
Dealer capacity can become a binding liquidity constraint
Correlations can converge when many participants need cash
Liquidity assumptions should be stress-tested
Diversification can weaken during forced selling
Position size must account for changing spreads and collateral needs
Sources and primary documents
Claims above link to the numbered records used in this case file.
Expanded case file with a full introduction, deeper analysis, conclusions, and claim-level citations.
Report an issue with this case file