Methodology

1. Benchmark Definition

The primary benchmark is the daily open-market USD/IRR reference rate.

This benchmark is intended to represent the prevailing parallel-market exchange rate for U.S. dollars in Iran, based on observed market pricing during a defined publication window.

RialWatch publishes one official daily benchmark value, not a live ticker. Each daily publication is either:

• Published, when sufficient validated market evidence is available
• Withheld, when market conditions or data quality do not support a reliable benchmark

The primary benchmark should be understood as the site's core reference value. Other cards on the homepage are supplementary market readings and do not replace the benchmark itself.

2. Market Structure

RialWatch monitors several distinct market layers because the Iranian rial does not trade in a single unified currency market.

Open Market / Street Rate

The open market is the flagship public benchmark.

It reflects parallel-market price discovery through dealer quotes and other observable market channels outside the official banking system. This is the market most closely associated with real-world dollar access and the practical purchasing-power exchange rate of the rial.

Official Commercial USD Rate

RialWatch also tracks the government-managed commercial-market dollar rate used for regulated settlement and commercial allocation.

This rate is not the primary benchmark. It is included as an important policy anchor and as a reference point for measuring the gap between managed and open-market pricing.

Regional Transfer Rate

Regional transfer markets reflect cross-border settlement channels used for trade, remittance, and capital movement outside ordinary domestic banking rails.

These readings are useful because they often move differently from domestic open-market prices during periods of capital stress or external funding pressure.

Crypto Dollar

RialWatch tracks crypto-implied dollar pricing as a distinct settlement channel.

Stablecoin-based dollar access can diverge from domestic cash markets, especially during periods of sanctions pressure, liquidity fragmentation, or demand for cross-border transfer.

Gold Coin Market

RialWatch also tracks domestic gold coin pricing as a parallel monetary signal.

Gold is widely used as a local inflation hedge and store of value. It does not represent the same instrument as the FX market, but it can provide useful context about longer-term expectations for inflation, currency weakness, and capital preservation behavior.

3. Units and Normalization

All published values are normalized into consistent units before calculation and display.

FX rates

Foreign exchange readings are displayed as:

Iranian rials per U.S. dollar (IRR per USD)

Gold

Gold coin readings are displayed as:

Iranian rials per coin (IRR per coin)

Because Iranian market quotes are often expressed in either rial or toman, RialWatch standardizes values into rials for internal consistency.

The conversion used is:

1 toman = 10 rials

If a market observation is quoted in toman, it is converted into rials before any calculation is performed.

4. Benchmark Calculation Approach

RialWatch uses a validation-first approach rather than publishing every observed quote directly.

Within the publication window, RialWatch collects available observations and evaluates them for usability. Readings may be excluded if they are stale, incomplete, clearly inconsistent with the broader market context, or otherwise unsuitable for benchmark publication.

When sufficient valid observations are available, the daily benchmark is calculated from the center of the usable market evidence rather than from a single raw quote. This is intended to reduce the effect of outliers, isolated bad inputs, or temporary distortions.

RialWatch also derives supplementary indicators from the relationship between the primary benchmark and the other monitored market layers, including:

• Street versus official commercial gap
• Street versus regional transfer gap
• Street versus crypto-implied dollar gap
• Official market trend measures, when sufficient history is available

These indicators are interpretive tools and are published separately from the benchmark itself.

5. Publication Rules

RialWatch publishes the daily benchmark only when the market evidence is strong enough to support a reliable reference value.

A daily value may be withheld when:

• too few usable observations are available
• observed values are stale or invalid
• market inputs are excessively inconsistent with each other
• technical or methodological conditions prevent a credible publication

This means RialWatch prefers to withhold rather than publish a number that may be misleading.

Published daily outputs are intended to function as reference records. Historical values are not silently rewritten once published unless a correction is explicitly required for methodological integrity.

6. Supplementary Readings

The homepage includes several non-benchmark cards that provide additional context.

These readings are not interchangeable with the primary benchmark. They exist to help users interpret broader currency conditions across:

• the open market
• the managed commercial market
• cross-border settlement channels
• crypto dollar access
• gold as a monetary hedge

7. Interpretation

The RialWatch benchmark should be read as a daily public reference for open-market USD/IRR price discovery, not as an official banking rate and not as a tradable interbank quote from a unified global FX market.

In parallel-market currency systems, different market layers can diverge substantially from one another. That divergence is not noise. It is part of the structure RialWatch is designed to measure.

8. Limitations

RialWatch is based on publicly observable market information and therefore has natural limitations.

• It does not claim to represent every transaction in the Iranian FX economy
• It does not replace official regulatory or banking publications
• It is not a live execution feed
• It may withhold publication when market evidence is insufficient
• Some supplementary indicators require more historical depth before they become meaningful

The goal is not to eliminate uncertainty. The goal is to provide a transparent, disciplined public reference for a market that is otherwise fragmented and difficult to observe.