Purpose – already for more than one hundred years there is ongoing discussion about the role and function of banks, which subsequently has affected banking regulation. Three theories of banking were dominant in different periods of 20th century: Credit creation theory (the oldest), Fractional reserve theory, Financial intermediation theory. Authors are contributing to the theoretical discussion with research showing that Credit creation theory and Financial intermediation theory reflect different insights on banks’ operations; Research methodology – literature review (regarding theories), financial ratio calculations (Loans-to-Deposits ratio); Findings – using Loans-to-Deposits ratio calculations for several banks researchers have found that banks’ lending process can be explained by Credit creation theory however banks’ Strategic Asset-Lability Management can be ex-plained by Financial intermediation theory; Research limitations – (a) only domestic banks were selected as in this research it is important to get needed relationship between deposits and lending. Subsidiaries of foreign banks could have not balanced balance sheet from Loans-to-Deposits ratio perspective as their funding could come from abroad if business model in Baltics is primarily lending oriented, (b) Baltic market was taken because of know-how of researchers about banks operations here and history of their transformation, (c) audited financial reports were used as they gave sufficient picture of banks Loans-to-Deposits ratio; Practical implications – theoretical discussion in this paper enlightens role and function of the banks thereby improving understanding of better banking regulation. Authors propose to adjust current banking regulatory framework which is focused on capital requirements; Originality/Value – current research provides some link between existing banking theories (Credit creation theory and Financial intermediation theory) shaping new hybrid concept and proposing adjusted regulatory framework based on this hybrid concept.