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The Effects of Overnight Events on Daytime Return: A Market Microstructure Analysis of Market Quality

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Abstract

This paper examines the trading and non-trading returns to diagnose the impact of market microstructure changes on market quality. The daily data of ten agricultural commodities traded on the National Commodity and Derivative Exchange (NCDEX) were used for the study. The data has been divided into three categories: year-wise, pre- and post-reform, pre-ban, and post-ban period. The study employs variance ratio analysis, and the results suggest high daytime and opening variances. A first-order autocorrelation detects the return predictability in the data series. A Value at Risk (VaR) and Expected Shortfall (ES) methods were employed to get more detail about the downside risk of the series. It suggested that daytime return has more risk compared to overnight return. Overall, this study suggests that market microstructure effects are visible in the Indian agricultural commodity market and hardly observe any improvement in the market quality. Since we reveal the impact of policy changes on market quality, the results will be useful for policymakers.

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Correspondence to Sreekha Pullaykkodi or Rajesh H. Acharya.

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Appendix

Appendix

1.1 Year-wise Backtest Results for All Commodities

See Tables 20, 21, 22, 23, 24, 25, 26, 27, 28, 29.

Table 20 Backtest results for Jeera
Table 21 Backtest results for Chana
Table 22 Backtest results for Castor seed
Table 23 Backtest results for Guar gum
Table 24 Backtest results for Gur seed
Table 25 Backtest results for Coriander
Table 26 Backtest results for Pepper
Table 27 Backtest results for RM seed
Table 28 Backtest results for Soy oil
Table 29 Backtest results for Soybean

1.2 Backtest Results for Commodities in the Pre and Post-reform Periods

See Tables 30, 31.

Table 30 Back test result for the pre-reform period
Table 31 Back test result for the post-reform period

1.3 Back test Results for Commodities in the Pre-ban and Post-ban Periods

See Tables 32, 33.

Table 32 Back test result for the pre-ban period
Table 33 Back test result for the post-ban period

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Pullaykkodi, S., Acharya, R.H. The Effects of Overnight Events on Daytime Return: A Market Microstructure Analysis of Market Quality. Asia-Pac Financ Markets (2023). https://doi.org/10.1007/s10690-023-09424-9

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