As I've been debating my ETF allocation, a regular suggestion has been to buy the Vanguard Total Stock Market Index Fund (VTSAX or ETF:VTI) - which holds all the publicly traded stocks of the United States - and buy nothing else.
Aka, VTSAX and chill.
To be sure, this is easy to implement, and it would be exceedingly tax efficient. Buying one fund and never selling is the height of simplicity. And since you're never rebalancing, you don't have to worry about tax costs eating into your gains over time (aside from pesky dividend taxes). Those are real benefits that I'd be stupid to dismiss.
It's also been difficult to beat. The U.S. stock market has been on an amazing run, and while I've been running backtests of different asset allocation strategies, it's been very hard to find strategies that outperform the market cap-weighted U.S. market. Especially in the years since the Great Recession, buying any asset other than the U.S. market has been an exercise in frustration. You have likely underperformed year after year after year. Value has been crushed. Ex-US stocks have gone mostly nowhere. Small caps have had mediocre returns.
Modern FIRE
During this period, the modern FIRE movement got its legs. Obviously, it existed before this great bull run, since the term comes from 1992‘s Your Money or Your Life. However, I believe this modern version with the blogs and internet forums has been aided by this incredible period of somewhat easy returns. Both Mr. Money Mustache and J. L. Collins began blogging in 2011, which was an amazing time to be buying U.S. stocks.
Both recommend VTSAX/VTI as the singular vehicle for investment. As the blue line in the above image shows, they've been 100% correct. Anyone who recommended anything else has been wrong.
But what about now?
Valuation
First, in the early part of the long bull market (interrupted occasionally by short and intense drawdowns), the U.S. stock market was fairly inexpensive.
For one, the S&P 500 had fallen to below its 200 month moving average. I repeat: below its 200 MONTH moving average. This had only happened before after the second crash of the 1970's and (if you extrapolate backwards) in the years following the Great Depression, both of which were incredible times to be loading up on stocks.
Secondly, in 2009-2011, it was possible to buy the U.S. market for CAPE ratios between 15 and 20. Today, however, it's near its second highest ever level:
An easy rebuttal: using the CAPE ratio for the past few years has been dumb. It's been warning for years that the market was expensive, but buying the U.S. market has been the winning trade. Admittedly, that's a fair critique. CAPE is an awful timing tool.
However, for anyone with a "buy and hold" mindset, stocks are long duration assets. That means that we stock investors shouldn't be focused on short term results. And focusing on a few years of outperformance is focusing on short term results. We need to look over time.
Over Time
In that vein, here's a chart that shocked me:
This is a comparison of three portfolios' performance since 1972 with a starting balance of $10,000. Dividends are reinvested, and the portfolios are rebalanced quarterly. The yellow line is U.S. Stocks, blue is a 60/40 portfolio (60% U.S. stocks, 40% 10-year Treasuries), and red is a 40/60 portfolio.
What do you notice?
For one, up to the end of April 2022, U.S. stocks have outperformed the more balanced stock/bond portfolios. Since 1972, U.S. stocks have returned 10.52% annually. 60/40 has returned 9.49%, which is clear underperformance. And when I see comparisons of the 60/40 portfolio to a pure stock portfolio, that's the framing I usually see.
However, that might not be the best framing. If you look at the box over the chart, that's the performance at the bottom of the 2008/09 crash. Notice that at that bottom, the pure stock portfolio had worse performance than the more balanced portfolios. That's 37 years of holding on to a volatile asset class only to be beaten by a much more conservative mix of stocks and bonds.
This makes it clear that we have to question our assumptions about the relative outperformance of one asset class vs. another. If you read my Update posts, you should know that I value my net worth at the end of the month, and I subtract out my freshly received salary. To me, I'm measuring what I've accumulated after all expenses are paid. It doesn't make sense to inflate my net worth if I'm about to spend it down.
I'm starting the view the stock market the same way. There's clearly some kind of cycle that happens over time, and measuring outperformance based on the results in the middle or peak of a cycle leads to lofty expectations. Yes, as of right now, U.S. market cap-weighted stocks are trouncing everything else. But that has been true in the past as well, and it didn't automatically mean that it continued into the future.
Will a pure U.S. stock portfolio's returns fall below a 60/40 mix after two decades ever again? I have no idea. Going back to the beginning of the 20th century, it appears that a pure stock portfolio does eventually pull away from that more diversified stock/bond portfolio. However, we don't know what time scale that requires. And we have to consider the specific events in the early 20th century that might have influenced that result, which we might not be so glad to repeat.
Market Cap Weighting Downsides
Part of the inescapable issue with VTSAX and all such indexes is the market cap weighting. The most valuable companies get the most dollars allocated to them. However, since market caps are driven by more than the business results, this can mean money allocated to the wrong companies at the wrong time. Looking at the largest S&P 500 holdings over time makes this clear: they were darlings for a time, and then they weren't.
Yes, yes, the indexes are eventually self-cleaning, and those companies will eventually become smaller and will get efficiently de-emphasized. Valuations eventually get sorted.
Without a second asset class, though, you just have to wait for that to happen, and you have to live with the volatility and year or decade long reshuffling to correct these imbalances. An upside of even a simple stock bond mix is that you can sell off the stocks as they get too expensive to put into something else. This makes the overvaluation of the market a benefit since it can be sold to buy something else.
That leads to the so-called rebalancing premium, whereby two assets together can outperform either one individually. You can’t do that with one asset all by itself.
We're All Making Bets
If you're buying VTSAX and chilling, you're making a series of bets:
- You are betting that the U.S. stock market is more or less efficient.
- You are betting that the U.S. is the best place to invest.
- You are betting that large cap stocks are basically where the majority of your money should be.
- You are betting that the downsides of rebalancing (taxes and complication) are significant enough to warrant putting all your money into a single asset class rather than diversify.
- You are betting that other asset classes aren't worth bothering with.
- You are betting on positive returns coming from earnings growth that justifies the current valuation.
It's easy to wave this all away by using words like "passive" and "efficient" and "indexing", but you're kidding yourself. You're making a very aggressive bet on one asset class.
It's one I'm not comfortable with. It is possible that I'm wrong. But since the future is unknowable, we have to consider a variety of future scenarios. You pays your money, and you takes your chance.
That’s a long post to say: I won’t be putting all my money into VTSAX. It's too concentrated in one style for my taste.
If you are, then you'll probably be ok. Just realize that the returns you're hoping for won't be smooth, and there may be long long periods of no growth or sideways choppiness that will be no fun. You'll probably also have times where other markets do better, which will tempt you to bail on your strategy.
If you're cool with all that, then enjoy your very simple tax-efficient U.S. stock allocation.
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