The document discusses traditional asset allocation models used by many financial planners that divide investments into categories like stocks, bonds, and cash. It notes that the standard 60/40 portfolio allocation of 60% stocks and 40% bonds and cash may not be optimal as smaller-cap stocks have outperformed large-cap stocks in the past 12 years while fixed income carries more risk now and cash provides no yield. The document suggests most advisors use simple asset allocation models to spread risk rather than actively choosing sectors that are performing well.