But the effect on banks is much more direct and much worse. If a bank has an FRS 17 deficit, this constitutes a reduction in its capital base. As capital is the raw material of its lending, having less of it means the bank has to lend less. So an FRS 17 deficit will lead directly to a scaling-back in the bank's level of activity which, in turn, will mean lower profits, and perversely, a reduced ability to make good the deficit out of earnings in future.