Выражение встречается в следующем контексте:

During the reference period both liquid assets and modelled net cash outflows increased by 5 billion euro. A uniform increase in the nominator and the denominator leads to a reduction of the LCR ratio for levels > 100%. The change was mostly driven by RBI AG which saw an increase of non-operational deposits of financial customers on the one hand and of withdrawable central bank reserves on the other.
В течение отчетного периода и ликвидные активы, и моделируемые чистые оттоки денежных средств увеличились на 5 миллиардов Евро. Равномерное увеличение в числителе и знаменателе приводит к снижению коэффициента LCR для уровней > 100%. Изменение главным образом произошло за счет банка RBI AG, который продемонстрировал увеличение неосновных депозитов?? increase of non-operational deposits финансовых клиентов с одной стороны и извлекаемых резервов центрального банка с другой.

Заранее спасибо

Что касается англоязычного вспомог. материала, нашлось такое:

Banks are required to distinguish between two types of short-term deposits.

Operational Deposits:
- Include general working capital and cash held by depositors for transactional purposes
- Basel III considers operational cash to be ‘stickier’ than non-operational cash, in the sense that companies are likely to maintain operational deposits with their primary transaction bank(s)
- Bank has to hold liquid assets equal to 25% of operational deposits

Non-Operational Deposits:
- Include other cash balances not immediately required by the depositor’s business
- More likely to be used to chase yield and to manage counterparty risk via the diversification of investment
- Susceptible to run, if credit rating of the bank taking the deposit deteriorates
- Bank has to hold liquid assets equal to 40% of non-operational deposits

http://www.citibank.com/tts/sa/eSource_academy/docs/Basel_III_and_Deposits_Webinar.pdf