As KiwiSaver approaches its twelfth anniversary there is growing interest from people in the performance of their funds. A new online tool launched by the government this year called Smart Investor has made it easier than ever to compare how well your fund is going against others. In the first of a three part series Money Editor Tamsyn Parker looks at the best and worst performing funds.

Some of the biggest KiwiSaver fund managers run some of the poorest performing funds while smaller niche funds are topping the list of best performers.

Analysis of the performance figures over the last