Liquidity Black Holes

Traders with short horizons and privately known loss limits interact in a market for a risky asset. Risk-averse, long horizon traders generate a downward sloping residual demand curve that faces the short-horizon traders. When the price falls close to the loss limits of the short horizon traders, selling of the risky asset by any trader increases the incentives for others to sell. Sales become mutually reinforcing among the short term traders, and payoffs analogous to a bank run are generated. A “liquidity black hole” is the analogue of the run outcome in a bank run model. Short horizon traders sell because others sell. Using global game techniques, we solve for the unique trigger point at which the liquidity black hole comes into existence. Empirical implications include the sharp V-shaped pattern in prices around the time of the liquidity black hole.

Modern financial regulation has been about the spread of market-sensitive riskmanagement systems for banks, the spill-over of this approach to other financial institutions and the retreat of regulatory ambition. There is evidence that these trends are leading to a more fragile financial system, more prone to concentration and ‘liquidity black holes’. The most glaring effects of these trends are felt in the pro-cyclicality and volatility of capital flows to risky markets. The root of the problem is that the liquidity of financial markets requires diversity, but all these trends are serving to reduce the diversity of behaviour of market participants.

LAPM: A Liquidity Based Asset Pricing Model

The intertemporal CAPM predicts that an asset’s price is equal to the expectation of the product of the asset’s payoff and a representative consum substitution. This alternative approach to asset pricing based on industrial and financial corporations’ desire to hoard liquidity to fulfill future cash needs. Our corporate finance a determinants of asset prices such as the distribution of wealth within the corporate sector and between the corporate sector and the consumers. Also, leverage ratios, capital adequacy requirements, and the composition of savings affect the corporate demand for li The paper first sets up a general model of corporate demand for liquid assets, and obtains an explicit formula for the associated liquidity permia. It then derives some implications of corporate liquidity demand for the equity premium puzzle, for the yield curve, and for the state-contingent volatility of asset prices. Finally, the paper looks at some macroeconomic implications of the theory. It shows that government may be able to boost aggregate liquidity and enhance economic efficiency by promoting job and asset price stability. On the liability side, long-term deposits and equity investments, which depend on the consumers’ endogenously determined liquidity needs, contribute to creating a feedback effect between employment prospects and equity-like investments. On the asset side, orderly sales of real estate by liquidity-squeezed institutions may generate a Pareto improvement.

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