The model portfolio assumes equal allocation to each ETF across a period of 5 years as well as a «hold till maturity» strategy with roll over thereafter. (zacks.com)
If somebody wants to maintain a discipline of 10 stocks in his / her portfolio with equal allocation to every stock then he has to deploy the additional cash equally among the ten holdings if it is worthwhile to invest (gap between intrinsic value and market value) at a particular point of time. (fundooprofessor.wordpress.com)