The Vanguard target date and life strategy "set it and forget it" funds, all contain at least 4 funds.
Total Stock Market: 3744 stocks
Total Bond Market: 6985 bonds
Total International Stock Market: 5673 stocks
Total International Bond Market: 2764 bonds
A total of 19166 unique assets. Betterment portfolios have more than 19166 unique assets?
The betterment portolio has exposure to the value and size factors. The target date funds do not. Exposure to the value, size, momentum, and quality factors have historically been associated with higher than cap weighted market returns.
They have the roughly same number of unique assets, but the weighting is different. Overweighting value companies and small companies, (or shorting large and growth companies) are the only way to gain exposure to those factors.
Got it. So it sounds like we're hoping the past performance of these factors, predicts future returns. Hoping that the market doesn't know about, or act on this free lunch, since that would eliminate the price advantage. Correct?
I'm not sure how that's any different than all the other active funds who claim to be able to beat the market based on historical performance and backtesting of this or that, then fail to beat it moving forward, but let's ignore that for now.
Imagine BosoxNelly goes with Betterment, based on these factors, and 2008 happens. Let's also assume BosoxNelly's portfolio drops 50%, exactly as much as the all-index portfolio. My opinion, is that BosoxNelly would have a higher chance of not staying the course in this scenario. If he/she believed the factors you mentioned would provide a less bumpy ride with higher returns, and they didn't, he/she might bail, looking for a new safe-haven/free-lunch.
In my opinion, the whole free-lunch mindset is toxic to the average investor. If they think they've found a magic bullet, and it ends up not being true, they might exit the market all-together. Maybe I'm biased, because I personally know people who thought they were positioned to beat the market, then bailed in early 2009, and I know other people who were indexed and said "Scared? This happens all the time, give it a few years", but's just my experience.
Dodge,
It seems to me that Your definition of "active" leaves much to be desired, including....
1. The market, value, size, momentum, and quality factors have been rigorously studied over hundreds of years of investment history in in and out of sample testing by the most rigorous academic economists of the modern era in a peer reviewed fashion. Eugene Fama, co-author of the 3 factor model, in fact, split a nobel prize with Robert Schiller last year for this research. Betting against the persistence of these factors is a far more "active" stance to take than betting on their persistence. The efficient market hypothesis (which you seem to advocate) in fact depends on risk based explanations for all of these factors and on the persistence of these premia in order to test its hypotheses.
2. By your definition Rick Ferri, Larry Swedroe, William Bernstein are all "active" investors since they all advocate small and value tilts.
3. By your definition even Jack Bogle is an "active" investor since he chooses to overweight US equities, and underweight international equities, commodities, alternative investments, and Real estate compared to the actual capitalization of the world economy.
4. To claim that your way of investing is "passive" and all other ways are "active" seems completely illogical by any metric.
As to your behavioral argument, I fail to see why someone would preferentially pull their money out of Betterment during a crisis when they literally never need to look at their account to mantain a consistent asset allocation. Alternatively, If you have a Vanguard slice and dice portfolio you must choose to sell your safe bonds and buy more toxic equities come rebalancing time in order to be effective, which isn't easy.
Your argument seems to be that since you have a gestault negative impression of Betterment, you would be more likely to pull your money out in a crisis which, while probably true, tells us exactly nothing about its value to anyone but you as an individual.