The biggest upheavals in pay and in risk management will be in wholesale banking.
Citi is still, however, cutting jobs a sign that the recovery in wholesale banking is patchier than on the retail side.
Thirdly, the wholesale banking operations, the collateralized loans, the derivative positions, the futures, puts and calls would be in their own unit.
The bank said loan-impairment levels in wholesale banking were "very low, " but that it is keeping a close eye on India and the Middle East for potential problems.
Abbey National, once a dull but solid British building society (thrift), moved into wholesale banking in an attempt to reduce its dependence on its traditional mortgage business, only to suffer big losses in high-yield credit and other novel businesses.
"In the case of Indonesian banks in Singapore, this will be by way of a broader provision of financial services, both in wholesale banking and to, for example, Indonesian students and work permit holders in Singapore, " the Monetary Authority of Singapore said in a statement.
Ring-fenced banks would also be prohibited from carrying out a range of investment and wholesale banking activities, including the sale of complex derivatives, which are highly complicated contracts designed to hedge borrowers against certain risks but can lead to heavy losses if they go sour.
Radianz has offered similar services with a secure network linking over 15, 000 customer locations for 11 years, back before cloud was a term used to describe such activities, said Chris Pickles, head of marketing for financial services and wholesale banking at BT Global Services, now the parent company of Radianz.
Dresdner might also try to woo the fiercely independent Commerzbank, which might make a more comfortable partner than Deutsche, but offers less in wholesale and investment banking.
Essentially what happened was wholesale runs on banking institutions.
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Moreover, say investment bankers, most wholesale and investment-banking business is done among professionals able to look after themselves.
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In Europe, universal banking, which combines retail and commercial banking with racier wholesale and investment sorts, is commonplace and likely to persist.
Nothing less than a wholesale bail-out of the banking system, using taxpayers' money and expanded public borrowing.
Mr Taylor found this hard: he lacked a power base to force through tough decisions even if he had wanted to, and so preferred to tackle big, strategic questions, such as what to do with the wholesale bank and its investment-banking arm.
Others have diversified out of boring retail banking into the more glamorous wholesale markets (securities trading and the like).
Until now, retail banking (unlike the investment and wholesale sort, which are largely international businesses competing in global markets) has not travelled well, but that is changing, for two reasons.
The commission, chaired by Sir John Vickers, suggests splitting the country's banks into two parts, dividing their retail- and commercial-banking bits from the racier investment and wholesale sorts.
The global credit crunch has forced Germany's wholesale banks to rethink their strategy, particularly regarding retail banking.
Retail banking has proved more resilient, which is why the wholesale banks want to get back in, having reduced their presence in favor of riskier businesses about a decade ago.
Trading businesses exhibit high reliance on short-term wholesale funding and to varying degrees what Fitch views as more volatile earnings than commercial banking, and with more opaque risk.
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