If a banking institution does not have sufficient funds to repurchase its securities back, it could obtain credit from the next facilities i.e., Seven-day Repo and/or Marginal Lending Facility. BIS Review 53/2004  5  Seven-day Repurchase Agreement This facility provides liquidity to banking institutions under the premise of monetary policy or liquidity management.
And that figure does not even include the capital measures taken in 2014 which do not count as CET1 capital. So the large German banks do not have any gaps in their risk-weighted capital ratios. Yet the markets and supervisors are also interested in the banks’ unweighted capital ratios, of course.