The main index of Tehran Stock Exchange, TEDPIX, gained 47,837 points and jumped 3.94% to finish trade at 1,262,253.
The rally swept through both the large and small caps with the former having the upper hand as shown by a 5% daily hike in the TSE-30 Index, which tracks the performance of top 30 TSE-listed companies in terms of market cap.
Giving a better perspective of small caps, the equal-weighted index also soared by 3%.
Prices in 89% of tickers increased on Saturday, riding on fresh liquidity brought mainly by retail investors. The net capital inflow by retail investors was 14.15 trillion rials ($56 million) for the day, the highest in the fourth quarter of the fiscal year (started Dec. 20), according to Eghtesad News website.
The trend was visibly spurred by the stock market regulator's decision to change daily price spread of shares to bolster a market that has been sidelined for more than four months after making meteoric gains.
Securities and Exchange Organization enforced a temporary plan on Saturday, based on which share prices spread asymmetrically from -2% to +6% per day instead of previously ±5%.
The new measure is aimed at avoiding the further depreciation of share prices and supporting millions of retail investors suffering a pile of losses.
TSE Trade
About 9.96 billion shares valued at 164.34 trillion rials ($657.37 million) changed hands at TSE for the day.
Esfahan Cement Company incurred the biggest loss among all TSE-listed companies and went down 2% to 342,410 rials per share.
Esfahan Cement Company contributed the most to the benchmark's fall, followed by Beh Pardakht Mellat, Alvand Tile Company and Ofogh Koorosh Chain Stores Company.
Persian Gulf Petrochemical Industries Company gave the biggest boost to the benchmark index, followed by Mobarakeh Steel Company, National Iranian Copper Industries Company and Social Security Investment Company.
IFB Up 1.9%
Iran Fara Bourse main index, IFX, gained 334.03 points, or 1.9%, to close Saturday trade at 17,873.12.
About 2.71 billion securities valued at 87.44 trillion rials ($349.77 million) were traded at the junior exchange for the day.
Pasargad Insurance Company, Gohar Zamin Iron Ore Company, Iranian Reinsurance Company and Minoo Industrial Group Company had the most negative impact on IFX.
Arya Sasol Polymer Company gave the biggest boost to IFX, followed by Zagros Petrochemical Company, Hormozgan Steel Company and Middle East Mines and Mineral Industries Development Holding Company.