The main gauge of Tehran Stock Exchange TEDPIX gained 151.87 points, or 0.05%, on Sunday to end trading at 305,774.4.
About 3.01 billion shares valued at 16.64 trillion rials ($141.12 million) changed hands at TSE for the day.
Trading at TSE and over-the-counter Iran Fara Bourse starts on Saturday and ends Wednesday, according to Financial Tribune.
Radiator Iran Manufacturing Company was the biggest winner as its shares went up 5% to 12,579 rials per share.
Loabiran Company (glass producer) incurred the biggest loss among all TSE-listed companies and went down 4.72% to 12,648 rials per share.
Esfahan Oil Refining Company contributed the most to the benchmark's fall, followed by Pars Petrochemical Company, Kharg Petrochemical Complex and Civil Pension Fund Investment Company.
Informatics Services Corporation gave the biggest boost to the benchmark index, followed by Islamic Republic of Iran Shipping Lines Company, Mobile Telecommunication Company of Iran and Persian Gulf Petrochemical Industries Company.
The Price Index gained 40.77 points, or 0.05% to close at 81,917.0.
The First Market Index was down 342.27 points, or 0.16% to post 220,143.7. Second Market Index increased by 2,348.99 points, or 0.37% to reach 631,247.0.
The Industry Index increased by 35.26 points or 0.01% to register 273,827.3. Free Float Index was up 193.73 points to hit 356,323.02.
TSE 30 lost 30.30 points to settle at 13,062.0 and the TSE 50 ended 13.28 points lower to finish at 11,872.0.
IFX Down 0.2%
Iran Fara Bourse main index IFX lost 8.36 points, or 0.21%, to close Sunday trade at 3,946.48.
About 1.5 billion securities valued at 7.54 trillion rials ($63.9 million) were traded at the over-the-counter exchange.
Marun Petrochemical Company, Zagros Petrochemical Company, Hormozgan Steel Company and MAPNA Asaluyeh Power Generation Company had the most negative impact on IFX.
Kowsar Insurance gave the biggest boost to IFX, followed by Iran Office Machines Industries and Sarcheshmeh Copper Investment Company.