BlackRock’s German offices searched

German prosecutors say they have searched the Munich offices of investment firm BlackRock, which said it was cooperating in a probe of a tax scheme known as “cum-ex” transactions that has drawn the attention of law enforcers. Prosecutors in Cologne said Wednesday they carried out the search Tuesday at the premises of BlackRock Asset Management Deutschland AG. BlackRock said in a statement that it was “fully cooperating with an ongoing investigation relating to cum ex transactions in the period 20072011.”