بررسي اثر آخر هفته و مقايسه رفتار سرمايه گذاران حقيقي و نهادي در بورس اوراق بهادار تهران بين سال هاي 1385-1381

Examination of Weekend Effect and Caparison of Individual and Legal Investorʹs Behavior During 1381- 85 in Tehran Stock Exchange

In this article using Autoregressive (AR), Autoregressive conditional heteroskedasticity (ARCH), Generalized autoregressive conditional heteroskedasticity (GARCH) Models we assess the weekend effect and also compare the trading patterns of individual and legal investors during 1381- 1385 in Tehran stock exchange. Our findings suggest that weekend effect exists in Tehran stock exchanges which are in contrast with the observed effect in the other countries stock exchange. In other stock exchanges, one of the reasons for generating the weekend effect is individual trading patterns while in Tehran stock exchange it seems both of individual and legal investorʹs behaviors are the main reason for this effect.