GIC and Temasek’s annualised returns revised?

In the media today, GIC has confirmed that its 20 year annualized rate of return was only 3.9% and Temasek’s was 15%. Who is spreading the misinformation that their returns were 17% annualized? How did people got such a fantastic figure that no fund managers would dare to claim? 17% annualized! Unbelieveable, incredible, insanity!

Oh, I remember that Professor Balding was using this number to