Tehran Stock Exchange's main index shed 420.90 points or 0.55% to end Saturday trade at 76,747.
More than 458 million shares valued at $58.7 million changed hands for the day.
Pars Company incurred the biggest loss among all TSE-listed companies as it went down 4.95% to 2,016 rials per share.
Bama Company was the biggest riser, going up 4.84% to 4,267 rials per share.
Ghadir Investment Group weighed the most on TEDPIX, followed by Iran Khodro, and Mobarakeh Steel Company.
Mines and Metals Development Company gave the biggest boost to the benchmark, followed by Iran Zinc Mines Development Company, and Calcimin Company.
The Price Index lost 150 points or 0.55% to end at 27,339.3.
The First Market Index gave up 343.20 points or 0.63% to 53,919.8.
The Second Market Index plunged by 634.50 points or 0.38% to 166,575.5.
The Industry Index dropped by 369.20 points or 0.58% to 63,715.6.
The Free Float Index withdrew by 589.44 points or 0.69% to 85,309.30.
The TSE 30 Index was down 26.20 points or 0.83% to 3,129.1.
The TSE 50 Index lost 18.30 points or 0.60% to 3,049.6.
> IFX Down 0.94%
The over-the-counter Iran Fara Bourse's main index IFX went down 12.7 points or 1.57% to end Saturday trade at 796.57.
More than 110 million securities valued at $17.3 million were traded for the day.
Pars Paper Industries Company saw the highest number of traded shares as 12.7 million of its shares changed hands.
Tehran Oil Refining Company had the highest trade value as 5.5 million of its shares worth $457,000 were traded.
Zarim Madan Asia Company, Mihan Insurance, and Shomalshargh Shahrood Industrial and Mining Company had the highest value increase.
Taliseh Company, Tadbirgaran Fars and Khuzestan Investment Company, and Marun Petrochemical Company saw the highest decline.
Tehran Oil Refining Company, Marun Petrochemical Company, and Hormozgan Steel Company had the most negative impact on the IFB benchmark.
