The latest SuperRatings monthly data  to end of July 2016  re-affirms a well-established trend: not-for-profit industry super funds have continued to outperform bank-owned funds in the short, medium and long term. This analysis shows, on average, industry super funds have recorded a superior performance of more than two per cent over the last 12 months in a volatile market. This result is consistent with longer term data showing a similar two per cent outperformance over ten years."The chronic underperformance by bank-owned super funds highlights concerns over the banks' vertically-integrated business models which continue generate huge profits while delivering lower returns to their superannuation members," said David Whiteley, chief executive of Industry Super Australia.Whitely also questioned the appropriateness of bank involvement in superannuation at all, given super is a mandatory savings system central to Australia's long-term economic and social prosperity."Amid calls for a royal commission into a multitude of financial sector scandals, the big banks must be held accountable for their practices and explain the cause of their chronic underperformance," he said.