But there is every chance the effect of the past two days could spill over into other areas of the market, and possibly prove fatal to a big European bank involved in Volkswagen share trades.
That institution happens to be the house bank of Porsche, part of the Volkswagen group, on whose supervisory board Mr Wulff sat during his Lower Saxony premiership.
Newspapers have speculated that the bank was repaying a favour by taking on the loan: Mr Wulff enlisted help from Volkswagen to save Porsche from bankruptcy in 2009.