金利は、債務者が負担する事業リスクに応じて定まるものと存じます。

、。

I believe that interest rates are determined in accordance with the business risk borne by the borrower.

Literal

Interest-rate [topic-は], borrower [subject-が] bear business-risk [to-に] according-to determined thing [quotative-と] humbly-think.

金利 'interest rate,' 債務者 'debtor/borrower,' 事業リスク 'business risk' — financial terminology. に応じて 'in accordance with, depending on' is a formal proportional pattern. 存じます is the humble form of 思います — used when stating opinions to superiors. Very formal business register.