Mafi muhimmanci a cikin kasuwanci shi ne masu ciniki su ji sun amince da kasuwa, da dokokinta, da ka'idojinta, da kuma yadda ake aiwatar da dokokin daidai kuma a kai a kai. Idan gwamnatoci suka shiga tsakani, ko ta hanyar haraji na shigo da kaya, ko harajin kudi, ko shiga tsakani kai tsaye (misali ESF), ko kuma ta hanyar canja doka, masu ciniki suna shiga damuwa kuma suna rasa amincewa da tsarin. Dokokin Shari'a a wannan fanni a bayyane suke. Annabi ﷺ ya ce:

The most important aspect of trade is that participants feel confident in the market, its rules, regulations and consistency of application of the rules. Where governments intervene whether via tariffs, taxation, direct intervention (eg ESF) or change of regulation, participants are frustrated and lose confidence in the system. The Shariah rules in this regard are explicit. The Prophet (Peace be upon him) said:

Wannan yana kafa ƙa'ida ta asali a fagen kasuwanci: cewa kasuwa, farashinta, da cinikayya, ya kamata a bar su a ‘yanci don su amsa ga ƙarfin tattalin arziki na cikin gida da gasa ta halitta ba tare da sarrafawa ba.

This establishes a basic principle in the field of commerce: that the market, its prices, and sales, should be left free to respond to internal economic forces and natural competition without manipulation.

Anas ya ruwaito: "Farashi ya yi tashin gwauron zabi a zamanin Manzon Allah ﷺ, sai suka ce masa: 'Ya Manzon Allah, don me ba ka sanya farashi (kayyade farashi)?' Ya ce: 'Hakika Allah ne Mai karɓa, Mai bada yalwar arziki, Mai azurtawa, kuma Mai ƙayyade farashi, kuma ina fatan in haɗu da Allah ba tare da wani ya zarge ni da aikata zalunci a kansa ba, ko a jini ko a dukiya.'" Saboda haka, ra'ayin yin magudi a kasuwa ko shigar da Gwamnati cikin kasuwanni an haramta shi gabaɗaya a cikin Daular Musulunci.

Anas reported: “Prices soared during the time of the Messenger of Allah (Peace be upon him) so they said to him; ‘O Messenger of Allah why don’t you introduce pricing (price controls)?’ He said; “Verily Allah is the Recipient, the Extender of wealth, the Provider, and the Pricer, and I hope that I will meet Allah (swt) without having anyone accusing me of having perpetrated an oppression against him be it in blood or in money.” So the notion of market manipulation or State interference in markets is absolutely prohibited in the Islamic state..

Ahmad da Abu Ubayd sun ruwaito daga Uqbah ibn Amir cewa Annabi ﷺ

Ahmed and Abu Ubayd reported on authority of Uqbah ibn Amir that the Prophet (Peace be upon him)

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said:

Sai dai idan an sanya harajin ramuwa (reciprocity) a kan kasashen da suke yi wa Daular Musulunci irin wannan, haramun ne a Shari'a a sanya irin wadannan haraji da ke takaita ciniki. Irin wadannan matakan kariya a kan abokan ciniki, kamar bayar da tallafi ga wasu masana'antu, sanya harajin kwastam (tariffs) da takaita hakkin mallakar fasaha (intellectual property rights), duk suna zama shinge ga cinikayya mai 'yanci, kuma ba su da wani matsayi a harkokin tattalin arzikin Musulunci. Amfani da kudin jama'a wajen ceton wasu kungiyoyin kasuwanci (bankuna) ma abu ne da ya saba wa adalci a harkokin tattalin arziki, kuma hakika sabon nau'i ne na haraji a kan talakawa, domin su ne za su biya kudin ceton ta hanyar haraji, ko ta yanke kashe-kashen gwamnati, ko kuma ta raguwar darajar dukiyarsu saboda hauhawar farashi (inflation).

Barring the imposition of customs for reciprocity when applied against the Islamic state, it is against the Shariah to apply such taxes which restrict trade. Similar protectionist measures against trading partners as subsidising some industries, tariffs and intellectual property right restrictions all act as barriers to free trade and have no part in Islamic economic life. Use of public money to bail out some business groupings (banks) is also an anathema to fair economic practice and is effectively a new form of tax on the masses who will pay for the bailouts via tax, cut backs in public spending or a decline in the value of their wealth via inflation.