Well, when we're building portfolios, once we know what model the client is going to be in, we want to do a couple things. We want to get very pure asset allocation exposure to certain asset classes. I mean we are believers that long-term investment portfolios -- the return and the risk are very much going to be determined by the asset allocation process where most individual investors are focused on "Is it a good time to be investing?" and none of us really ever know that.
Whether or not this is a good stock or a fund, and is a question of whether or not anybody is particularly good at picking those. So we really want to look at "What's the asset allocation we think is appropriate for a client?" And then when building and constructing the portfolios there are certain asset classes -- particularly large cap U.S. equities -- where we want to just have pure exposure. And we want to have it in a transparent, tax-efficient way, and ETF portfolios and ETF products are one of the best ways to get that core exposure to certain asset classes.