If sending more than one email is feasible, you can also consider a tiered approach, where a series of automated emails are sent at different time intervals following an abandonment episode. (blog.hubspot.com)
If you will be drawing from your investments at different time intervals then it is important to separate your portfolio by time frames. (canadiancapitalist.com)
Great collection of images which can be customized to appear at different time intervals. (apps.goodereader.com)