Investors are taking too much risk and not thinking about investment factors when creating their portfolios, whether they are a big sovereign wealth fund or a small investor, said Michael Hunstad, head of quantitative strategies at Northern Trust Asset Management. Hunstad said he knows this is the case because 85 percent of the clients at Northern Trust fall into this category, taking significant risks with their portfolio. But by targeting certain factors, investors not only can lower their overall risk, but also boost returns, he said.