Traders at Goldman Sachs recorded only one daily loss in the third quarter, highlighting the trading bonanza sweeping Wall Street as central banks continue to pump billions of dollars into the financial system. The performance – revealed on Wednesday in a regulatory filing – compares with two losing trading days in the previous quarter. Before the crisis, banks regularly recorded trading losses on several days in a quarter. Goldman made more than $100m in profits on 36 of the 65 days in Q3.