RNZ Radio 7 February 2019
Playing with numbers. 1. Dollar cost averaging: How it gives you bargains; Does it work if you have a lump sum? 2. Rule of 72: How long for an investment to double?; If investment has doubled, what was your return? 3. 40 years in KiwiSaver: 3 times as much in high-risk fund; 1.5 times as much with lowest fees.