Effects of a price limit change on market stability at the intraday horizon in the Korean stock market

Wonse Kim and Sungjae Jun

Applied Economics Letters, 2019, vol. 26, issue 7, 582-586

Abstract: This article investigates the effects of a price limit change on the volatility of the Korean stock market’s (KRX) intraday stock price process. Based on the most recent transaction data from the KRX, which experienced a change in the price limit on 15 June 2015, we examine the change in realized variance after the price limit change to investigate the overall effects of the change on the intraday market volatility. We then analyse the effects in more detail by applying the discrete Fourier transform to the data set. We find evidence that the market becomes more volatile in the intraday horizon because of the increase in the amplitudes of the low-frequency components of the price processes after the price limit change. Therefore, liquidity providers are in a worse situation than they were prior to the change.

Date: 2019
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DOI: 10.1080/13504851.2018.1488043

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