Fiqh al-Gharar — Prohibited Uncertainty in Islamic Commercial Law: The Second Great Prohibition After Riba, Governing What Makes Contracts Void and Why Modern Derivatives, Insurance, and Speculation Raise Concerns

The Two Pillars of Islamic Commercial Law

Islamic commercial law has two great negative pillars:

1. Riba (prohibition of interest/usury)
2. Gharar (prohibition of excessive uncertainty)

Just as virtually every Islamic finance instrument is designed to avoid riba, so too it must avoid gharar. These two prohibitions together define the shape of permissible Islamic commerce.

What Gharar Means

Gharar literally conveys danger, risk, hazard — specifically the risk that comes from not knowing what you are dealing with. Classical jurists analyzed gharar as uncertainty about:

• The object of the sale: Does the sold thing exist? Can it be delivered?
• Quantity: How much is being sold?
• Quality: What condition is it in?
• Price: What price will be paid and when?
• Time: When will the transaction be completed?

Uncertainty in any of these dimensions — when it is material and could be avoided — renders the contract void.

Tolerated vs. Prohibited Gharar

Not every uncertainty is prohibited. Scholars distinguish:

• Gharar yasir (minor gharar): unavoidable and inconsequential — permitted. Example: buying a melon without cutting it open first.
• Gharar kathir (major gharar): material, significant, and avoidable — prohibited. Example: selling “the fish in the sea” or “the bird in the sky.”

The test is whether the uncertainty is so significant that it could lead to major dispute between the parties.

Applications in Contemporary Finance

Conventional insurance: The insured pays a premium; receives benefit only if a loss event occurs. The amount received and whether anything is received are uncertain. Most classical scholars identify this as gharar. Islamic insurance (takaful) restructures the relationship as mutual solidarity.

Derivatives: A futures contract to buy oil at a future date at a fixed price involves multiple layers of uncertainty about whether the commodity will exist, what market conditions will be, and whether delivery will occur. Structured derivatives raise significant gharar concerns.

See also: Fiqh Al Tawarruq, Fiqh Al Murabaha, Fiqh Al Madhab Al Maliki, Fiqh Al Madhab Al Hanbali, Ilm Al Usul