Soaring technology stocks helped more than 20 superannuation funds deliver returns above a median of 9.1 per cent last year, and investment chiefs of the top performers say there are still plenty of opportunities for the artificial intelligence revolution to drive up retirement savings.

The initial wave of returns sparked by Nvidia’s meteoric rise to become the world’s most valuable company in June – the AI outfit is now larger than the entire ASX – helped fuel returns for the year ended June 30.