This is a continuation of Part 1: Extension of Retirement or Standalone Portfolio?
If you’ve chosen a standalone portfolio for your 529 plan, every provider will offer you age-based portfolio that automatically adjusts based on the age if your child. In general, it starts out with mostly stocks and over time becomes mostly bonds and cash. This preset plan is called the glide path.
My biggest gripe about the glide path of most age-based default portfolios is their short holding periods for stocks. Nearly every one starts with a ton of stocks, and then quickly shifts to a ton of bonds. You’re basically hoping for big stock returns over a short window of time, which is more gambling than investing. Allow me to explain…
Here is the glide path for Moderate Age-Based Option of the Vanguard 529 plan, Nevada (click to enlarge):
You start at 75% stocks, and then at 6 years old you are down to 50% stocks, and then at age 11 you are down to 25% stocks. So 25% of your portfolio only holds stocks for at most for 6 years. (Imagine if you contributed money at age 5.) Another 25% is only held at most for 11 years.
If you contributed equal amounts of money every year to this Nevada 529 moderate age-based plan, your average hold time for half your portfolio (2/3rds of the stock portion) is around 4-5 years in stocks. If you did a lump-sum in the beginning, the average hold time for half your portfolio would be 8.5 years.
Here is the glide path for Moderate Age-Based Option of the UESP 529 plan (Utah):

You start at 80% stocks, and then at 7 years old you are down to 60% stocks, and then after another 3 years (age 10) you are down to 40% stocks. At age 13, you are at 20% stocks. That means 20% of your portfolio only holds stocks for at most 7 years. Another 20% only holds stocks at most for 10 years. Another 20% holds stocks at most for 13 years.
If you contributed equal amounts of money every year to this Utah 529 moderate age-based plan, your average hold time for 60% your portfolio (75% of all your stock holdings) is around 5 years in stocks. If you did a 100% lump-sum in the beginning, your average hold time for 40% of your portfolio would be 8.5 years.
Hold time vs. Investment returns
Here is a customized chart from PortfolioCharts.com that shows how past returns varied by holding period for the US stock market. (More info on these charts here).
Note that within 5-year and 10-year periods, there are lots of white and red squares which indicate periods of zero or negative inflation-adjusted returns. The longest drawdown was 10 years. Wouldn’t you like to have ridden that out with a longer holding time?
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Side note: Some people have criticized the sharp step-downs in the glide path. Vanguard addressed this concern in their 529 whitepaper [pdf]. They ran back-tested simulations and found little difference between a smoothed and stepped glide path (click to enlarge).
They concluded asset allocation was more important, which I agree with, but I wasn’t satisfied with the amount of evidence supporting their short stock holding periods. Sure, on average things look good, but in any given 5-year period things could be quite bad.
My alternative plan is more slow-and-steady, just like my overall retirement portfolio. I will start out with a balanced allocation at roughly 60% stocks and 40% bonds, as opposed to 75%, 80% or 100% stocks. I will then stay that way as long as I can so the stock portion will have a long holding period. Probably 6 years out from college, I will convert 10% from stocks to bonds/cash. So 60/40 > 50/50 > 40/60 > 30/70, and so on until I am at 100% cash at age 18.
I will also front-load my contributions so that they are within the first few years. I know not everyone can do that. This means I will hold all of my stocks for a minimum period of 10 years, with the average holding time closer to 15 years. Look again at the green/red chart above with a 15-year holding period.
I haven’t quite decided on the exact fund mix, but I have settled on using the Utah 529 plan, as it allows full customization and scheduling of your own glide path with a pretty solid menu of low-cost and passive investment options. Last part of this series will have the full implementation.


I’m finally getting around to setting up 529 college savings plans for my kids. It remains my opinion that you should make sure your retirement savings are on track before worrying about college savings. The government let me borrow over $50,000 in student loans for college, but they won’t let me do that again for retirement.
My wife and I both hold IRAs at Vanguard.com, and we each have our own usernames and passwords. This used to work out fine – I would login to either one when I needed to update our portfolio-tracking spreadsheet. But after enabling two-factor authentication, it became a nuisance as the security code would be sent only to her cell phone and she’d then have to forward it back to me within 10 minutes.









I like the idea of living off dividend and interest income. Who doesn’t? The problem is that you can’t just buy stocks with the highest dividend yields and junk bonds with the highest interest rates without giving up something in return. There are many bad investments lurking out there for desperate retirees looking only at income. My goal is to generate reliable portfolio income by not reaching too far for yield.

The U.S. Department of the Treasury announced the national launch of 

Author and investment advisor William Bernstein wrote a thoughtful
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