Shariah-compliant stocks are shares in companies that pass a two-stage Islamic screening process: a business activity screen and a financial ratio screen. Investing in screened stocks is one of the most established forms of halal investing, with dedicated indices tracking thousands of companies globally.
The screening process
1. Business activity screening
Companies are excluded outright if their core business involves prohibited (haram) activities: alcohol, gambling, conventional (interest-based) banking and insurance, pork products, adult entertainment, or weapons manufacturing. A company doesn't need to earn all its revenue from a prohibited activity to be excluded — most screening methodologies set a low tolerance threshold (commonly around 5% of revenue) for incidental exposure.
2. Financial ratio screening
Even a company in a permissible sector can fail on its balance sheet structure. The most widely used thresholds (used by indices like the S&P Shariah and FTSE Shariah) are:
- Debt-to-market-cap ratio below 33% — excludes heavily leveraged, interest-financed companies
- Interest-bearing assets (cash and interest-bearing securities) below 33% of total assets
- Accounts receivable / illiquid assets — total illiquid assets should exceed interest-bearing liabilities
Financial services companies (banks, insurers) are generally judged case by case rather than against the standard ratios, since their entire business model is often interest-based.
Purification
Even a stock that passes both screens can generate a small amount of incidental non-compliant income — for example, interest earned on a company's cash reserves. The standard practice is purification: donating the equivalent proportion of investment income (not principal) to charity, separate from zakat obligations. Scholars broadly agree purification applies to dividends; there's more debate on whether it should also apply to capital gains.
Major Shariah-compliant indices
| Index | Region | Notes |
|---|---|---|
| S&P Shariah Indices | Global / US | Applies AAOIFI-based screening to constituents of the broader S&P indices |
| FTSE Shariah Global Equity Index Series | Global | Screens FTSE universe constituents across multiple regions |
| Dow Jones Islamic Market Index | Global | One of the earliest Shariah indices, launched 1999 |
These indices are a useful starting reference for which large-cap companies currently pass screening — though inclusion changes as company financials shift, so any list should be treated as a snapshot rather than a permanent verdict.
A worked example: applying the ratios
To make the screening concrete: take a company's interest-bearing debt (bonds, loans, mortgages — anything requiring interest payments) and divide it by total assets. A low ratio suggests the company isn't reliant on interest-based financing to operate; a high ratio is a red flag both financially (higher risk of distress) and from a Shariah perspective (heavier reliance on riba-based structures). The same logic applies to the illiquid-assets and interest-bearing-assets ratios — each is a proxy for how entangled the company's core economics are with prohibited structures, not just an arbitrary accounting threshold.
Challenges of Shariah-compliant stock investing
- Smaller opportunity set — the screened universe is meaningfully smaller than the full market, which can make diversification harder, particularly by sector (financials and highly-leveraged industries are structurally underrepresented).
- Screening complexity — ratios are calculated from quarterly financials and can shift a company in or out of compliance between review periods, so a static list can go stale.
- Still market risk — screening removes Shariah non-compliance, not ordinary market volatility; a halal-screened portfolio is not a lower-risk portfolio by default.
Building a screened portfolio
- Use a dedicated Shariah screening tool or index provider rather than screening companies manually from scratch.
- Diversify across sectors and regions within the screened universe to manage concentration risk.
- Re-check holdings periodically — a company that passed screening a year ago may not pass today if its debt or interest-bearing assets have grown.
- Set aside the purification percentage on dividend income as a routine part of your process, not an afterthought.