چکیده (انگلیسی):

ABSTRACT: The Purpose of this research is to study the relationship between risk and return on equities in Tehran
stock exchange using the volatility model. This was a descriptive research performed using the correlation method.
The cash return index growth and the industry index were used as measures which showed total return
(independent variable). All present companies in Tehran stock exchange were included in the statistical population
of this research, fifty of which were selected and included in the statistical sample using the conditioning method.
The research data included statistics of total index, industry index, cash return index and the price, and cash return
index, the 50-best companies’ index, the main board index, and the secondary board index. The results show that
the volatility models make the relationships between the risk and the return on equities possibl e in the accepted
companies in Tehran stock exchange.