“…Also Easley et al (1997b) argued about information content between trades, Easley et al (1997a) about trade size, Easley et al (1998) about analyst coverage, Easley et al (2001) about stock splits, and Easley et al (2002) about asset pricing. Many studies used PIN index as proxy of information asymmetry, such as Heidle and Huang (2002), Vega (2006), Ascioglu et al (2008), Brockman andYan (2009), Kang (2010), Aslan et al (2011), Abad and Yague (2012), Chen and Zhao (2012), Dey and Radhakrishna (2015), Lin et al (2013), Sankaraguruswamy et al (2013), Chang and Lin (2015), Agudelo et al (2015) and Paparizos et al (2016).…”