NEW YORK (Reuters) -Citigroup Chief Financial Officer Mark Mason said at a conference in New York that investment banking fees and market revenue are expected to rise by mid-single digits in the third quarter compared to a year earlier.

Mason also said the global revenue and expenses for the year may be higher than the guidance of $84 billion and $54.3 billion, respectively. But Mason added the proportion between expenses and revenue did not change, so the impact of the higher numbers would be neutral to positive to earnings.

In July, the bank beat estimates for second quarter earnings, fueled by rising revenue in banking, markets and wealth management. At the time, the results drove shares to their highest since 2008, and the bank said it planned to buy back at least $4 billion in stock

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