Equity Options During the Shorting Ban of 2008

Nusret Cakici, G. Goswami, Sinan Tan
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引用次数: 4

Abstract

The Securities and Exchange Commission’s 2008 emergency order introduced a shorting ban of some 800 financials traded in the US. This paper provides an empirical analysis of the options market around the ban period. Using transaction level data from OPRA (The Options Price Reporting Authority), we study the options volume, spreads, pricing measures and option trade volume informativeness during the ban. We also consider the put–call parity relationship. While mostly statistically significant, economic magnitudes of our results suggest that the impact of the ban on the equity options market was likely not as dramatic as initially thought.
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2008年卖空禁令期间的股票期权
美国证券交易委员会(sec) 2008年发布的紧急命令禁止在美国交易的约800家金融公司做空。本文对禁售期前后的期权市场进行了实证分析。利用OPRA(期权价格报告机构)的交易水平数据,我们研究了禁令期间期权交易量、价差、定价措施和期权交易量的信息性。我们还考虑了买卖权宇称关系。虽然大多数统计意义显著,但我们的结果的经济规模表明,禁令对股票期权市场的影响可能不像最初想象的那样剧烈。
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