Goldman Sachs shares rise after topping estimates on strong trading results.

The bank said profit roughly doubled from a year earlier to $4.11 billion, or $11.95 a share, as revenue grew while expenses shrank. Revenue jumped 23% to $13.87 billion, helped by higher equities and fixed income trading revenue, and rising investment banking results.

Shares of the firm rose more than 5% in morning trading.

Equities trading generated $3.45 billion in revenue, roughly $450 million more than the StreetAccount estimate. Fixed income trading had $2.74 billion in revenue, topping the estimate by almost $300 million. Investment banking fees of $2.05 billion essentially matched the estimate.

Source: CNBC