What you'll learn in this lesson: what a share and a ticker symbol actually are on the Tehran Stock Exchange (TSE), how the overall index is calculated and read, which days and hours the exchange is open, and how the daily price fluctuation band limits how far a ticker's price can move in one session.
Definitions
Share (سهم, "sahm") is a unit of ownership: whoever buys one share of a public joint-stock company owns that same fraction of its profits, losses, and assets. When people say "Foolad Mobarakeh shares," they mean these ownership units in Foolad Mobarakeh Isfahan; a shareholder is neither the company's creditor nor its employee, but one of its owners, in proportion to the shares held.
Ticker symbol (نماد, "namad") is the short code each listed company trades under, e.g. "Foolad" for Foolad Mobarakeh or "Vabmellat" for Bank Mellat. The ticker is just a fixed trading label; even if a company's official name changes, its ticker usually stays the same so its trading history is not lost.
Overall index (شاخص کل, known internationally as TEDPIX) is a number representing the weighted average of price and dividends across every company listed on the TSE; larger companies by market value carry more weight in this number. When the overall index rises, it means the market has grown in aggregate, weighted by company size, not that every single ticker turned green at once.
Price fluctuation band (دامنهٔ نوسان) is the daily ceiling and floor within which a ticker's price can move relative to the previous session's closing price. The Tehran Stock Exchange sets this limit, and it can differ across ticker categories and be revised from one period to another.
The mechanism: from order to index
During trading hours, buyers and sellers submit buy or sell orders at a specified price and volume for each ticker in the trading system. The system matches these orders, and the price at which the largest volume trades becomes that ticker's live price. This price can never move beyond that day's price band ceiling or floor. If almost all orders are on one side (say, only buy orders piling up at the ceiling), the ticker forms what is called a "buy queue" (صف خرید): buy orders stack up at the ceiling price, and trading proceeds only as fast as matching sell orders arrive; the mirror case is a "sell queue" (صف فروش). At the end of each trading day, every ticker's closing price, weighted by its market value, feeds into the overall index formula, producing that day's new index reading; this is why a handful of large companies can move this number as much as dozens of smaller ones combined.
A worked example
Suppose a hypothetical ticker "Alef" opens a trading session with a previous closing price of 1,000 tomans, and that day's (hypothetical) price band is set at 5 percent. That means the price cannot go above 1,050 tomans or below 950 tomans that day, no matter how strong demand or supply becomes; if every buyer is queued at 1,050 tomans, any additional demand only lengthens the buy queue rather than pushing the price past the ceiling. For the overall index, consider one real, dated figure: the TSE's overall index closed at 5,286,783 points at the end of trading on Wednesday, July 8, 2026 (17 Tir 1405). This number changes every trading day, since it is derived from the weighted average price and dividends of thousands of tickers, so today's reading will already be different.
In Iran's market
The Tehran Stock Exchange is open Saturday through Wednesday; Thursdays and Fridays are closed (aside from exceptions like mid-week public holidays). Official trading hours for ordinary shares run from around 9:00 a.m. to 12:30 p.m. Tehran time, preceded by a short "pre-opening" phase for initial order entry. Tickers are split across two main markets: the Tehran Stock Exchange itself, mainly for larger companies, and Iran Fara Bourse, for smaller or newly listed companies; each runs its own index and listing rules. The daily price band differs across ticker categories (ordinary shares, exchange-traded funds, debt securities) and is not fixed forever: Iran's Securities and Exchange Organization can revise it during calmer or more volatile periods. For the exact, current figure for any given ticker, check the exchange's official notices or that ticker's own page in the trading system. Getting a trading code and registering with Sejam, the steps before opening your first trading account, is the subject of the next lesson in this series.
Common mistakes
- Confusing the ticker with the company's full name: a ticker is only a trading code and sometimes bears no obvious resemblance to the company's official name.
- Assuming a rising overall index means every ticker is up: because the index is weighted, a few large companies rising can lift the index even when most smaller tickers close lower that day.
- Believing the price band prevents multi-day losses: the band only limits a single day's move; a ticker can hit the same ceiling or floor for several consecutive days and still post a large cumulative gain or loss.
Summary
A share is a unit of company ownership, a ticker is that share's trading code, the overall index is the weighted average price and dividend reading across every listed company, and the price fluctuation band is the daily ceiling and floor on each ticker's price move. These four concepts underpin every later report or analysis of the Tehran Stock Exchange. In the previous lesson, How Markets Discover Prices, you learned the general mechanism of supply, demand, and price discovery; this lesson followed that same mechanism specifically inside the Tehran Stock Exchange.
Educational
Educational
Analysis
Analysis