The rate of return traditionally tends to be higher if you have an active management strategy because of risk taking. However, for a pension plan that's as big and that has such a long-term perspective, personally I believe it's appropriate to be a bit more aggressive than passive to ensure that it has as high a rate of return as possible while maintaining an acceptable level of risk. To maintain an acceptable level of risk, the best solution is to diversify. It would be unwise to buy, for example, one stock or a very limited number of stocks. But, with the size of its assets, it can manage to have a much more aggressive stance while also limiting its risk exposure by diversifying into different markets, classes of assets and so on.
On October 2nd, 2018. See this statement in context.