The Washington Post wrongly implied that a provision in the Senate bill that prohibits banks from brokering derivatives will prevent them from offering trades in derivatives to clients. The Post article contrasted this restriction with "one-stop-shopping" offered by European banks.
Actually, this provision would only prevent the bank itself from brokering derivatives which would mean that this trade would not be provided with the protection of the FDIC and the Fed that are intended to apply only to insured deposits. Under this provision, there is nothing that would prevent bank holding companies from establishing derivative trading divisions, which would have to be independently capitalized, or from contracting with independent brokers to offer services to their clients.
In both cases, the banks would be able to offer the same one-stop-shopping provided by their European counterparts. Therefore, one-stop-shopping is clearly not an issue in the debate over this provision.