The AAOIFI 30/30/5 Rule: How Halal Stock Screening Works

If you are a Muslim investor, you have probably heard of the "30/30/5 rule" for halal stock screening. But what exactly does it mean, who created it, and how does it work in practice? This guide explains everything you need to know about the AAOIFI screening standard.

What is AAOIFI?

AAOIFI stands for the Accounting and Auditing Organization for Islamic Financial Institutions. Founded in 1991 and headquartered in Bahrain, AAOIFI develops Shariah standards, accounting standards, and governance principles for Islamic financial institutions. Their stock screening standard (Shariah Standard No. 21) is the most widely adopted methodology for determining whether equities are permissible for Muslim investors.

The Four Screening Criteria

Under the AAOIFI standard, a stock must pass all four of the following screens to be considered Shariah-compliant:

Screen 1: Business Activity

The company's core business must not be in a haram (prohibited) industry. Companies are automatically rejected if they operate in:

• Alcohol production or distribution
• Gambling and casinos
• Tobacco
• Conventional banking and insurance (interest-based)
• Pork products
• Weapons and defense manufacturing
• Adult entertainment

Some industries like entertainment, packaged foods, and restaurants are flagged as "questionable" and require additional review, as they may have mixed revenue streams.

Screen 2: Debt Ratio < 30%

Interest-bearing debt divided by the company's market capitalization must be less than 30%. This ensures the company is not excessively reliant on riba (interest-based) financing. Market capitalization is used as the denominator because it represents the current market value of the company, providing a dynamic and up-to-date measure.

Screen 3: Cash Ratio < 30%

Cash and interest-bearing securities divided by market capitalization must be less than 30%. This screen addresses the concern that a company holding large amounts of cash in interest-bearing accounts is generating significant haram income. If too much of a company's value comes from cash rather than productive business assets, it begins to resemble a financial instrument rather than a real business.

Screen 4: Income Ratio < 5%

Non-permissible income (primarily interest income) divided by total revenue must be less than 5%. This is the strictest threshold and ensures that even if a company has some incidental haram income, it remains a negligible portion of overall revenue.

Why Market Cap as the Denominator?

A common question is why AAOIFI uses market capitalization rather than total assets. The reasoning is that market cap reflects the true economic value of a company as determined by the market. Total assets can be inflated by intangibles and accounting choices. Market cap also automatically adjusts as conditions change, making the screening more responsive to current reality.

Common Misconceptions

• "Halal screening is binary" -- Not exactly. A stock can be compliant one quarter and non-compliant the next. Compliance is dynamic and must be monitored regularly.
• "If a stock passes, all income from it is halal" -- Even compliant stocks may have a small percentage of non-permissible income that must be purified (donated to charity).
• "All screening providers agree" -- There are multiple screening methodologies (AAOIFI, DJIM, MSCI, S&P Shariah). They differ in thresholds and denominator choices, which can lead to different results for the same stock.

How Halalytic Automates This

Halalytic's stock screener automates the entire AAOIFI screening process. Enter any stock ticker and get instant results showing pass/fail status for each of the four screens, along with the exact ratios. You can also track compliance trends over time and find Shariah-compliant alternatives for any stock.