A senior Deutsche Bank trader and key ally of the bank's former head of foreign exchange and rates, Sam Wisnia, is following his boss to join Edward Eisler's $2.6bn hedge fund.

Kal El-Wahab, head of euro, pound, Swiss franc and Scandi swaps, gilts, inflation and short-term interest rates trading at Deutsche Bank, handed in his resignation this week, according to people familiar with the move.