The trade used derivative products tied to U.S. inflation and Germany's largest bank is examining whether its traders breached risk limits on the deal, Bloomberg also reported.

Deutsche Bank declined to comment when contacted by Reuters.

Deutsche Bank settled a lawsuit for $170 million earlier this month that claimed that the bank had conspired with other banks to manipulate the benchmark European Interbank Offered Rate and related derivatives.

(Reporting by Parikshit Mishra in Bengaluru, editing by David Evans)