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股指期货交易会降低股市跳跃风险吗?
id: 2345
Date: 20161018
status: Published
Times:
Magazines
20l5年第1期
Author
陈海强, 张传海
Content
研究股指期货交易对股市跳跃风险的影响,不仅对完善金融市场监管,加强市场风险管理有着重大意义,而且有助于增进人们对股指期货功能、市场微观结构和信息效率的认识。本文基于5分钟的高频数据研究了沪深300股指期货交易对股市跳跃风险的影响。首先,我们利用非参数方法检测沪深300指数价格L6vy跳跃;然后将L6vy跳跃分解为大跳和小跳,并考察股指期货推出前后它们各自的强度、幅度以及跳跃活跃指数的变化;最后检验跳跃风险与股指期货交易活跃程度之间的Granger因果关系。研究主要发现:(1)股指期货交易不会增加大跳强度,相反会平抑大跳幅度,从而减少现货市场大跳风险;(2)由于投机交易,股指期货交易会增加小跳强度,因而增加现货市场小跳风险;(3)现货市场跳跃风险对期货市场交易行为存在反馈影响,但不同幅度的跳跃产生的影响不同。本文研究结果显示,股指期货推出对于股市跳跃风险的影响具有双刃剑的作用,我国股指期货功能有待健全。
JEL-Codes
Keywords
股指期货;Levy跳跃;非参数方法;Granger因果检验;高频数据
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