The newly appointed chief executive of Royal Bank of Scotland Group PLC said there are no "sacred cows" when it comes to paring the global bank's balance sheet and reducing its risk as part of a turnaround strategy.

Stephen Hester is pitching the new contours of the bank to investors as part of RBS's effort to raise GBP 15 billion ($23.86 billion) from the private sector to meet the requirements of its bailout by the U.K. government.