The impact of policy responses on stock liquidity

Thomas Busch and Thorsten Lehnert

Applied Economics Letters, 2014, vol. 21, issue 12, 842-845

Abstract: The collapse of Lehman Brothers in 2008 marked the peak of a financial crisis that is affecting the entire world of finance. This period is characterized by increasing fear of further defaults by corporations (including banks) or even by countries. In reaction, investors began shifting their assets to more stable and secure investments and this resulted in stock market crashes. Various policy interventions were initiated to restore stability. In this article, we analyse the impact of these interventions on stock liquidity, proxied by a new liquidity measure. The interventions, which we consider, are published by the Federal Reserve Bank (FED) in the form of a crisis timeline. Here, they are further combined to the following categories: bank liability guarantees, liquidity and rescue interventions, unconventional monetary policy and other market interventions. The results indicate that the market reacts positively to liquidity and rescue interventions, whereas bank liability guarantees reduced stock liquidity. In addition, we show that international events have a significant impact on the domestic market. By analysing the spreads of different trading volumes, an asymmetric effect can be detected, where the impact on lower trading volumes is substantially more pronounced compared to higher trading volumes.

Date: 2014
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DOI: 10.1080/13504851.2014.892193

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