Europe is, supposedly, fixed: between the upcoming one year anniversary of the 3 year LTRO, which has flooded the continent in excess €1 trillion of liquidity, and the OMP, which has supposedly backstopped sovereigns in perpetuity (even though the market has fully frontrun what now appears to be a massively unpopular political decision, as Spain has been demonstrating for the past 2 months), European bank liquidity needs are supposed to be fully taken care of. Yet something went bump on Halloween. As the ECB reports, borrowing on the prohibitive, and largely "last resort" ECB "Marginal Lending Facility" (whose rate is an usurious 1.50%), one or more banks saw their need for EUR explode in the last day of the month, sending overall usage on this credit line to €7.8 billion, the most since mid-March, and a surge of over €7 billion overnight. What spooked European banks so much (whose liquidity needs are not month or quarter-end window dressing driven) that the ECB had to step in on top of everything else it has already done? We will surely find out soon.