The TASI indexis the headline index of the Saudi stock market (Tadawul) and the most important gauge of the market's overall performance. When you hear that "the market rose today," it usually refers to this index.
What Does It Measure?
TASI tracks the overall performance of companies listed on the Main Market — banks, petrochemicals, telecoms, and more. A rising TASI means the market's total value is increasing, and a falling one means the opposite.
How Is It Calculated?
TASI is based on free-float-adjusted market capitalization, so each company's weight depends on its tradable market value. Larger companies therefore have a bigger impact on its movement.
To understand company weighting, see market capitalization.
Main Market vs. Nomu
- Main Market: larger companies with stricter listing rules — this is what TASI measures.
- Nomu (parallel market): smaller companies with lighter requirements, a separate index, and often aimed at qualified investors.
Why Investors Watch It
The index gives a quick read on market sentiment and direction and is used as a benchmark to compare a stock or portfolio against the market. But it is an average and does not necessarily reflect every individual stock.
How to Use It on Wrqti
Follow the Saudi market and most-active stocks via the TASI dashboard, then move to Stock Insights to study a specific company and its financial metrics.
Summary
TASI mirrors the Saudi market as a whole, but it is no substitute for analyzing each company through its own metrics such as the PE ratio and return on equity.
FAQ
What does the TASI index measure?
TASI is the headline index of the Saudi stock market (Tadawul), measuring the overall performance of companies listed on the Main Market.
What is the difference between the Main Market and Nomu?
The Main Market hosts larger companies with stricter listing requirements, while Nomu (the parallel market) is for smaller companies with lighter requirements, often aimed at qualified investors.
How is the index calculated?
It is based on free-float-adjusted market capitalization, so larger and more freely traded companies have a bigger impact on its movement.
Does a rising TASI mean every stock is up?
No. The index reflects the overall average; some stocks can rise while others fall on the same day.
Also read the Financial Disclaimer.