عدم تقارن تغییر خلاف جهت در بازار مالی چین

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 We investigate the intraday return–volatility correlation in Chinese financial
market with high-frequency transaction data of individual stocks. In contrast to
the widely accepted theory of volatility asymmetry (i.e. negative returns induce
higher price volatilities than positive ones), we show that the price volatilities in
Chinese market react more intensively to positive returns than their reaction to
negative returns. This reverse volatility asymmetry is mainly due to the higher
trading volume associated with positive returns, that is, in Chinese market the
investors’ rushing for a price rising stock makes the positive returns arouse higher
volatility than their negative counterparts. So in an average sense, a positive
return–volatility correlation is observed for most of the individual stocks in our
sample. Besides, price jumps play an important role in the significance of this
positive correlation. For most of the individual stocks in our sample, the positive
correlation is insignificant until jumps are totally eliminated in both return and
volatility. For multiple stocks analysed together, the jumps of individual stocks
are mostly diversified, and therefore a significant positive return–volatility correlation
shows up irrespective of the existence of jumps. Moreover, our results are
robust in different market conditions, no matter in depression or flourish

.
Keywords: leverage effect; reverse volatility asymmetry; local variance
measures; jumps

جهت ترجمه تخصصی فنی مهندسی + پروژه های نرم افزاری مهندسی صنایع، ارزان و با کمترین هزینه با [e-mail] تماس بگیرید.