Tehran Stock Exchange Opens Down About 2.5% on Sunday, July 12, 2026: The Psychology of the Sell-Off and Systematic vs Fundamental Risk

Tehran's stock market opened deep in the red again today, so why do even fundamentally good stocks get sold off? On Sunday, July twelfth, the overall index fell about two and a half percent at the open. The index dropped to about five million fifty-six thousand, down two and a half percent. These back-to-back pressured sessions stem from renewed Iran and US tension. The overall, equal-weighted and Farabourse indices all fell together today. A sell queue means sell orders far outnumber buyers at the price-band floor. Both the overall and equal-weighted indices falling shows the selling is broad. Sound stocks fall because the price of risk rose, not their intrinsic value. Fundamental risk is about the company; systematic risk shakes the whole market. Knowing this difference separates an emotional decision from an informed one. Fear, loss aversion and herding push selling beyond the size of the news. Too few buyers force even undecided investors to sell into the queue. History says systematic sell-offs are fast but less durable, with no set timing. Watch the index path, the exchange rate and regional tension news. Just watch. A passing fear or a real drop? Share your view in the comments.