Table 2

Summary statistics and preliminary analyses

CountryMeanCVSKKTUnit root testConditional heteroscedasticitySerial correlationPersistence
ADFARCH(1)ARCH(5)ARCH(10)Q(1)Q(5)Q(10)Q2(1)Q2(5)Q2(10)
Stock returns
Brazil0.0853.780.3311.72−59.46***I(0)160.27***56.83***30.40***0.042.9120.31152.34***413.70***550.79***−0.09***
China−0.04−73.43−0.018.80−46.86***I(0)159.65***51.06***27.14***0.0412.68**13.93151.03***384.55***494.75***0.10***
India0.0641.36−0.119.54−55.19***I(0)878.47***204.47***105.64***0.0220.00**36.77***765.65***1416.50***1691.20***0.05***
Indonesia0.03104.940.265.75−50.66***I(0)22.64***17.81***26.37***0.007.7316.61*22.50***167.70***279.17***0.03*
Russia0.001213.46−1.1031.64−62.42***I(0)76.94***39.26***23.38***0.003.519.9775.70***272.83***391.29***0.05***
South Africa0.0640.970.047.04−67.55***I(0)204.24***54.18***38.16***0.0311.03*27.54***197.04***343.48***587.70***0.09***
South Korea0.00493.060.6612.08−52.72***I(0)289.84***108.63***56.11***0.0013.27**19.43**263.82***806.27***934.86***0.02
Turkey0.0934.150.137.55−32.33***I(0)67.29***24.41***13.57***0.0113.97**17.89**64.99***149.12***181.92***0.03*
Vietnam0.0374.67−0.9015.94−36.95***I(0)6.33**2.14*0.990.0013.45**22.49**6.32***13.16***13.300.02
Stock market uncertainty
Brazil17.171.113.4917.65−7.16***I(0)5.78**8.49***5.42***16.30***44.93***84.30***5.79**50.48***69.33***0.98***
China8.071.162.6511.78−9.41***I(0)1.530.560.2919.21***21.41***32.61***1.542.953.110.94***
India6.071.034.5833.74−10.55***I(0)205.97***42.67***21.43***347.01***374.85***397.86***199.24***216.35***219.90***0.98***
Indonesia7.780.583.8226.83−11.59***I(0)2.3426.06***14.62***8.92***31.17***40.36***2.34127.34***166.25***0.89***
Russia5.531.624.8429.95−4.97***I(0)0.000.040.021.8620.75***23.77***0.000.200.230.99***
South Africa6.170.693.7925.81−8.42***I(0)11.08***3.52***2.28**52.51***75.27***87.83***11.07***19.02***25.56***0.98***
South Korea5.770.934.2730.75−5.64***I(0)3.94**5.79***3.04***96.66***326.77***341.59***3.95**30.27***32.72***0.99***
Turkey9.080.703.4121.43−12.19***I(0)0.240.730.404.11**21.41***28.79***0.243.814.210.88***
Vietnam6.631.4817.44426.25−22.09***I(0)0.000.000.000.000.540.840.000.010.020.49***
Global oil uncertainty
WTI7.692.9012.91203.33−10.08***I(0)639.16***136.24***71.56***511.22***531.00***624.00***577.42***680.19***723.79***0.98***
Brent7.273.4016.74349.47−9.37***I(0)1.120.270.24108.36***158.32***203.60***1.131.422.460.96***
Other global uncertainty measures
CIU21.570.672.067.90−15.54***I(1)10.42***4.40***1.67*14.65***23.79***26.64***10.32***23.61***23.70***0.95***
GPR113.570.614.5138.10−9.84***I(0)83.38***50.55***56.74***507.83***678.41***838.96***82.30***347.10***816.30***0.82***

Note(s): CV – Coefficient of variation; SK – Skewness; KT – kurtosis; ADF – Augmented Dickey-Fuller; CIU – COVID induced uncertainty; GPR –Geo-political risk. The ***, ** and * denote statistical significance of the corresponding tests at 1%, 5% and 10%, respectively. The ADF statistic tests the null of unit root, where significance indicates that the series are stationary. Significant ARCH statistics indicates evidence of ARCH effect in the series; while the significant Q(.) and Q2(.) statistics show evidence of series correlation at the specified lag order

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