Inspired by Kevin Kingsbury's piece at MarketBeat, we decided to take a look at the flow of capital in and out of asset classes over time to see how good investors are at predicting market movements. In his piece, Kingsbury notes a spike in outflows from long-term mutual funds just before a late November market rally, citing ICI for his data on money flow. When we saw they had a downloadable spreadsheet with historical data going back to January 2007, we decided to take a closer look at the ability of investors to time the market.
How did they do? In the following scatterplot, each dot represents a month and an asset class. On the x-axis we show the flow of capital into an asset class, on the y-axis we show the corresponding percent change in that asset class[1].
If investors as a whole are good at timing the market, then we should see a positive correlation (visually, a trend line with a positive slope). Instead, we see a noisy plot consistent with a hypothesis of no correlation. So, at best, investors do not consistently predict market movements and allocate assets accordingly. At worst, they're more likely than not to sell out of a market before gains are realized. The average trend-chaser never catches up.
The difficulty of achieving above-average returns via market timing is well-documented. Here's Jack Bogle (as quoted in Malkiel's A random walk down Wall Street):
In 30 years in this business, I do not know anybody who has done it successfully and consistently. Indeed, my impression is that trying to do market timing is likely, not only not to add value to your investment program, but to be counterproductive.
As a recent example, here's Larry Swedroe writing for CBS MoneyWatch. He warns against the impulse to pull out of the stock market during these uncertain times:
While it's difficult to stay in the market when risks are high, that's when expected returns are high. It's easy to stay in the market when risks seem low, but that means you buy when expected returns are low and sell when expected returns are high, which doesn't make sense.
The market is a poor advisor: don't let it make your allocation decisions for you. Determine an acceptable level of risk, allocate your investments accordingly, rebalance, and reap rewards in the long run.
Note:
- We used index funds VTI, VEA, and VBMFX as proxies for the domestic equity, foreign equity, and total bond markets.
Edit: We clarified the conclusion we're willing to draw from this data set.
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Josh Tokle is a member of the finance team at FutureAdvisor.