Traders at Goldman Sachs made more than $100m in profits on 36 of the 65 days of the third quarter, highlighting the trading bonanza sweeping Wall Street as central banks continue to pump billions of dollars into the financial system.

Goldman said yesterday that it had recorded only one daily trading loss in the quarter.

The performance – revealed in a regulatory filing – compares with two losing trading days in the previous quarter and suggests the authorities' drive to revive markets after the crisis is yielding huge windfalls for some financial institutions.

In the previous quarter, Goldman reported record trading revenues and had 46 days with $100m-plus in profits, partly due to the bank's decision to rein in risk-taking in areas such as interest rates and equity.

Goldman's ability to reap large profits without ramping up risk underlines the changing nature of trading on Wall Street.

After taking large bets with their own capital prior to the crisis, several banks have now taken advantage of reduced competition, higher margins and government-provided liquidity to make money in less risky activities.

Goldman doubled its trading profits in credit from $1bn in the second quarter to $2bn in the past three months and also grew profits in equities by about 25 per cent to $3.4bn, according to the filing.

The past year of trading in the US fixed-income market has been a watershed for dealers, investors and the Federal Reserve. Amid a surge in new Treasury debt and auctions and the failure of large investment banks such as Lehman Brothers and Bear Stearns, the Fed has become a dominant presence in many parts of the market.