Ala ọkwa na-amememe akụkụ onodu na ihe ụlọ azụ họpụtara, na-agbatị oke nhata. Nʻihi na ọnụ ala akụkụ gụnyere ujụ ụlọ azụ, ala ọkwa na-abụkarị ihe na-ebuweghị ihe — mana ụfọdụ oge, karịsịa na market ndị dị mfe, ọ siri ike gafee ya.
Ike mma: jụtụ ọkwa emepụtara ya na ọkwa kacha nma na-adịkwa emepụtara ya na exchange. Ọkwa emepụtara 2.20 ebe ụlọ azụ ezi obi siri ike na-asọ 2.10 bụ ezi oké mma na oke akụkụ zubere; ọkwa emepụtara 2.20 ebe ezi ọnụ bụ 2.35 bụ ọkịkọ ifo nke azụ.
Ala ọkwa: 2.00 → 2.20, oke kacha elu £10. Exchange na-azụ otu ihe ahụ na 2.16, nsonaazụ 2.12 eze emebighị azụ. Ịnara ala ọkwa (2.20 / 2.12 − 1) ≈ +3.8% mgbọrọgwụ na-atụ anya na oke akụkụ emepụtara — ihe na-adị mkpa, na ihe na-adịkwa mkpa iji ghara imetụta olu ụlọ azụ ahụ.