The main TSE index TEDPIX rebounded by 0.2% and regained 522 points from earlier losses to close trading week at 246,790 points.
Stocks cheered by the positive performance of petrochemical and pharmaceutical companies amid weaker performance of machineries, food, construction and investment groups.
More than 3.33 billion shares valued at 13.57 trillion rials ($118.03 million) changed hands on Wednesday, according to Financial Tribune.
Trading at TSE and Iran Fara Bourse starts on Saturday and ends Wednesday.
Melli Industrial Group was the biggest winner as its shares went up 5% to 50,583 rials per share.
Atieh Damavand Investment Group incurred the biggest loss among all TSE-listed companies and went down 8.31% to 3,011 rials per share.
Telecommunication Company of Iran gave the biggest boost to the benchmark index, followed by Persian Gulf Petrochemical Industries Company, Ghadir Investment Group, Mines and Metals Development Investment Company, Tamin Petroleum and Petrochemical Investment Company.
Golgohar Mining and Industrial Company contributed the most to the benchmark's fall followed by the Islamic Republic of Iran Shipping Line (IRISL), National Investment Company of Iran and Jam Petrochemical Company.
The Price Index gained 145.21 points to close at 68,607.1.
First Market Index was up 363.96 points to post 182,373.0. Second Market Index increased by 1,131.79 points to reach 488,458.8.
The Industry Index went up by 708.52 points to register 220,876.5. Free Float Index was up 233.73 points to register 274,884.02.
TSE 30 went up 29.85 points to settle at 11,130.6 and the TSE 50 gained 31.20 points lower to finish at 9,994.3.
Iran Fara Bourse’s main index IFX rose 0.62% to close Wednesday trade at 3,206.88 points.
Over 1.67 billion securities valued at 7.91 trillion rials ($68.81 million) were traded at the junior exchange for the day.