The financial crisis and the banking technology shows that the "trading" is specific. This is why the Basel Committee estimates that it appropriate to regulate banks trading activity in a specific way. But it is difficult to characterize the activity of "trading" and actual banking activity itself.
Trading is limited to negotiation; it justifies less equity as security, since it does not present credit risk. But this characterization even is questionable. This is why a consultation opened on May, 3 by the Basel Committee, and the qualification, and the classification of operations, and the measures of prevention of risks to be taken by specific prudential measures. Responses can be made until September 7, 2012.