What is Islamic Finance?

Islamic finance is an economic system founded on the principles of Islamic law (the Sharia), as codified by scholars over the centuries and adapted to the realities of modern markets by institutions such as the AAOIFI (Accounting and Auditing Organization for Islamic Financial Institutions).

Contrary to a common misconception, Islamic finance does not boil down to "banning banks." It is a complete framework that defines what is lawful (halal) and what is forbidden (haram) in financial transactions, drawing on the Quran, the Sunnah of the Prophet (peace be upon him) and the consensus of scholars (ijma).

The first pillar: the prohibition of riba

The term riba literally means "excess" or "increase." In finance, it corresponds to any guaranteed surplus charged on a loan or a deferred exchange, regardless of the actual outcome of the economic activity.

The Quran is explicit on this point:

"Allah has permitted trade and forbidden riba." (Quran, 2:275)

Scholars classically distinguish two forms of riba:

• Riba al-nasi'a: the surplus charged because of a delay. This is the most common form in modern finance — the interest rate on a bank loan is the typical example. You borrow €1,000 and you repay €1,050: the extra €50 is riba.
• Riba al-fadl: the unequal exchange of goods of the same nature. Two kilos of gold for three kilos of gold is not permitted: for precious metals the exchange must be at parity and immediate — this is the "hand to hand, like for like" principle (yadan bi yadin, mithlan bi mithlin) established by the hadith of the six ribawi goods (Sahih Muslim, Kitab al-Musaqat, hadith 1587) (see rule R9 on tokenized gold).

Concretely, this means that the prohibition of riba covers:

• Interest-bearing savings accounts (Livret A, interest-paying accounts)
• Conventional bonds (whose coupon is fixed interest)
• Conventional mortgage loans
• Derivative products carrying a guaranteed return

The second pillar: the prohibition of gharar

Gharar means "uncertainty" or "excessive ambiguity." Islamically, a contract that rests on major uncertainty regarding the object sold, the price or the terms is forbidden.

Scholars distinguish two degrees:

• Gharar yasir (minor): acceptable uncertainty inherent to any transaction. When you buy an Apple share, you do not know its future price — that is a normal gharar yasir.
• Gharar fahish (excessive): uncertainty that vitiates the contract. A naked option on a share you do not own, where you bet on the direction of the market without any real delivery, falls under gharar fahish.

Practical examples:

• Conventional insurance: you pay a premium in exchange for uncertain compensation — scholars classify it as haram (gharar + investment in interest-bearing bonds — see OIC Res. 9/1985 and AAOIFI SS26). The Sharia alternative is Takaful, a cooperative system of mutual guarantee.
• Certain NFTs whose value is purely speculative and whose utility is uncertain.
• Interest rate swaps (IRS) and other synthetic derivatives.

The third pillar: the prohibition of maysir

Maysir refers to gambling. Any contract whose gain or loss depends solely on chance, without work or real economic risk, is forbidden.

The Quran associates them explicitly:

"O believers! Intoxicants, gambling (maysir), idols and divining arrows are an abomination, the work of Satan. So avoid them." (Quran, 5:90)

Concretely:

• Casinos and online games are haram (pure maysir).
• Certain structured-product arrangements that resemble directional bets on an index.
• Lotteries, even "charitable" ones.

Caution: investing in the stock market is not maysir. The shareholder takes a real economic risk linked to a company's activity — it is a sharing of profits and losses (musharaka), not a bet on a random draw.

What Islamic finance permits

Islamic finance is not a finance of abstinence. It permits and encourages:

• Trade (bay'): buying and reselling with a lawful margin
• Profit-sharing (musharaka / mudarabah): partnering with a business, sharing its profits AND its losses
• Investment in halal equities: buying shares of companies whose activity is lawful and whose financial ratios respect the AAOIFI thresholds (see rules R1 to R5)
• Direct rental real estate: renting out a property is perfectly lawful
• Sukuk: Islamic bonds backed by real assets (not by an interest-bearing loan)

Why HalalStack relies on the AAOIFI

The AAOIFI (founded in 1991, based in Bahrain) is the international reference institution for Sharia standards in finance. Its Sharia Standard N°21 (SS21) precisely defines the compliance criteria for shares and financial instruments.

HalalStack applies these standards deterministically through rules R1 to R11, without producing any new fatwa. This stance is identical to that of the leading international screening providers at their launch.

In summary

Islamic finance is not a constraint — it is an ethical framework that aligns your investments with your values.

Disclaimer

This article is provided for informational purposes by HalalStack, based on methodology v1.0.0 (AAOIFI Sharia Standard N°21, Hanafi school by default, unless otherwise stated). It constitutes neither a personal fatwa nor investment advice within the meaning of Article L.541-1 of the French Monetary and Financial Code. HalalStack is not an investment advisor (CIF) authorized by the AMF.

The verdicts presented are the result of the deterministic application of objective criteria to public factual data. They do not take into account your personal situation (assets, objectives, investment horizon, risk aversion).

For any significant decision, we recommend consulting a scholar qualified in fiqh al-mu'amalat and, if necessary, a licensed wealth management advisor.

The HalalStack methodology is public, versioned and contestable. Any disagreement may be reported to methodology@halalstack.app.